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FORD BRONCO -> ELECTRICAL; EEC/PCM, Self-Test, wiring diagrams... -> Wiring Diagrams
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Although we initially developed this site for 78-96 Big Broncos, information in many Links also applies to Ford Trucks, Vans & Cars.
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1356 Electric Shift Speed Sensor Wiring Diagram
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
1356 Electric Shift Wiring Diagram in a 93
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
300 CID, 84-85, Feedback Carbureted Problem Areas; "...This pickup/Bronco application typically suffers from abuse, neglected service and a poorly designed manifold and feedback system. The vehicle will drive tolerably in open loop all the time, suffering from poor driveability and fuel economy (typically in the 8-10 mpg range). Check the mixture control solenoid on the carburetor for a varying duty cycle. A fixed 50 percent duty cycle is the open-loop default value. Check the oxygen sensor for switching (frequency) and amplitude. Verify powers and grounds to the ECU (computer - located inside, above the accelerator pedal). The ECU and 02 sensor grounds are on the firewall in the engine compartment low on the driver's side. Other critical inputs to the computer are the coolant temperature sensor and manifold absolute pressure (MAP) sensor (frequency-based), which both ground ahead and above the battery on the right inner fender well. Manifold leaks are very common (both intake and exhaust). Check all manifold, carburetor mounting and manifold preheat bolts and gaskets for tightness and leaks (flowing propane around gasket areas makes this fairly simple). The exhaust manifold is a relatively thin casting and can be badly warped, particularly if the vehicle has been heavily loaded, used for towing or driven through deep water. A leaking exhaust manifold will dump raw oxygen on the O2 sensor and can make the feedback system attempt to go rich. Carburetor throttle shaft wear is an area for particular attention. Some of the carburetor screws have a propensity for vibrating loose and having the carb literally disassemble itself in normal use. When rebuilding the carburetor pay careful attention to the reassembly of the accelerator pump components -- the washer goes on top of the diaphragm, not below it. This problem has been seen on several remanufactured carburetors as supplied from the rebuilder. Rejetting should be considered a last resort. Air injection switching (upstream, downstream), exhaust system integrity, and catalyst function are areas of common problems on these trucks as well..."
Source: by aircarecolorado.com
4WABS Self Test Connector pic in a 95 (near driver's side hood hinge)
Source: by s8c2 (the wagon) at SuperMotors.net
Air Bag Diagnostic Monitor Location pic in 94-96; as Steve83 pointed-out, "...The module I MIS-labelled as "Airbag" is actually the Wiper Control Module (WCM). The Airbag Diagnostic Module (ADM) is light blue, wrapped in black foam, above the gas pedal..."
Source: by Ryan M (fireguy50) at fordfuelinjection.com
Air Bag Diagnostic Monitor Location pic in 94-96; as Steve83 pointed-out, "...The module I MIS-labelled as "Airbag" is actually the Wiper Control Module (WCM). The Airbag Diagnostic Module (ADM) is light blue, wrapped in black foam, above the gas pedal..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Air Bag Wiring Diagram for a 93 Taurus but Similar; includes possible short locations where the HEAVY DARK LINES are in the wiring diagram; read more
Source: by Ford via tbird100636 at fordforums.com
Air Bag Wiring Diagram, Operation & Troubleshooting for 94-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Air Conditioning & Heater Wiring Diagram in a 79 w/AC
Source: by Ranger429 (Trailer Special) at SuperMotors.net
Air Conditioning Wiring Diagrams in a 94
Source: by Richard B at SuperMotors.net
Air Horn Wiring Diagram in an 88
Source: by Adrianspeeder (The OJ Special, The Lariat, The Bronco) at SuperMotors.net
Alternator Test; "...The battery must be fully charged (see fig. 1). Run the engine and verify that no-load voltage is 13.8 - 15.3V (check as in fig. 1). Next, load the alternator to rated output current with a carbon pile across the battery. Run the engine @ 2000 RPM. Check the current with an 80i-410 or 80i-1010 current clamp. The unit must maintain at least 12.6V @ rated output..." read more
Source: by assets.fluke.com
Alternator Wiring Diagram in an 83 (see #3)
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Alternator Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Alternator, (3G) Wiring Diagram in an 87
Source: by Tire_Biter (Don M) at fte
Alternator, 60-100 amp (2G) Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Alternator, 95 amp Wiring Diagrams in a 93
Source: by Bobby (blue) at SuperMotors.net
Anti-Theft & Keyless Entry Module & Connector Location Diagram Ford Part Numbers, Depictions, etc. from Ford Workshop Manual in 96 Bronco, F-150, F-250, F-350, F-Super Duty Chassis Cab & Motorhome Chassis; use your Browser's SEARCH (or FIND) function to locate what you seek in each Diagram, such as key, etc.
Source: by Ford via thedieselstop.com
Audiovox Alarms, Remote Start & Keyless Entry Owners Manuals
Source: by audiovox
Auxiliary/Off-Road Light Wiring Diagram
Source: by KC200787 at SuperMotors.net
Battery Drain; "...Disconnect the positive clamp on your battery but take care not to touch the body metal with the wrench when doing this. Now connect an small light between the + terminal and the clamp. Put the clamp on a rag so it can't touch the sheet metal. If any drain is present the light will glow. Or you can check the amount of drain with an small ammeter. An drain of 1-2 Watts can be tolerated. Next pull the fuse for the mechanic clock and the radio. Still any current flowing (light on)? Ok, so you really have a problem. Now start pulling the fuses in the fuse box one by one until the light goes off. This is the circuit in which the problem lies. Check your manual or the indications in the cover of the fuse box to see which systems are connected to that fuse. The next steps depend on the systems concerned. Try disconnecting each one of the parts connected in the circuit. Again it's the same - when the light goes out you've found the problem. Even better than a light bulb is an buzzer. Many people have one of those annoying little rascals lying around. Use it..."
Source: by Alain H at landroverclub.net
Battery Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Borg Warner 1356 Electric Shift Speed Sensor Location & pic in a 92
Source: by yoomooman (eddy) at SuperMotors.net
Borg Warner 1356 Electric Shift Speed Sensor Wiring Diagram
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Borg Warner 1356 Electric Shift Speed Sensor Wiring Diagram & "...The speed sensor is important because the vehicle must be stopped for a shift into or out of 4L. The shift module won't make the shift if the vehicle is moving. speed sensor should show 225-275 ohms with the vehicle stopped. Check at the module connection..." Miesk5 Note Ford Part Number is 7f293 speed sensor
Source: by Dustin S (Dustball, Mellow Yellow, Mr. Laser Boy) at ylobronc.users.superford.org
Brake Light & High Mount Wiring Diagram in 92-95 Bronco & F Series (Partial)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Brake Light (Feed-Through Circuit in Multi-Function Switch (MFS), Hazard, Turn, Flash-to-Pass, Dimmer High & Low Headlight Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Brake On-Off Switch, Brake Light & High Mounted Stop Lamp, Back- UP Lamp, License Lamp, Turn Signal, Daytime Running Lights Module, Head Light, Hazard, Trailer Marker Relay, etc. Wiring Diagram in 92-96 Bronco & F 150
Source: by seijirou at SuperMotors.net
Brake On/Off (BOO) Switch 13480: The brake on/off switch tells the powertrain control module when the brakes are applied. The switch is closed when the brakes are applied and open when they are released. The PCM uses this signal to disengage torque converter clutch when brake is applied. Failed on or not connected — Torque converter clutch will not engage at less than 1/3 throttle. Failed off — Torque converter clutch will not disengage when brake is applied. DTC: 536, P1703. ..." READ MUCH MORE
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Brake On/Off (BOO) Switch Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Brake Shift Interlock Troubleshooting & Overview Compendium
Source: by Ford via miesk5 at FSB
Brake Shift Interlock, Inadvertent Disablement TSB 99-13-9 for 94-96; "...Corporate, municipal, or police fleets may have had their 1992-1999 Ford Motor Company vehicle modified to flash the brake lamps whenever the police lights or other aftermarket lights are turned on, which may disable the brake shift interlock. The brake shift interlock is a feature that prevents the vehicle from being shifted from Park unless the brake pedal is depressed. Disabling of the brake shift interlock feature may enable the operator to inadvertently apply the accelerator instead of the brake pedal and simultaneously shift from Park to a Drive gear. ACTION: As appropriate, dealers should advise owners (including corporate, municipal, and police agencies) that any vehicle that has been modified with a connection to the brake circuit, or that electrically interfaces with the brake lamps in any manner, should be disconnected IMMEDIATELY and the emergency lighting system should be modified in a manner that does not interfere with normal vehicle operation or the brake shift interlock. In addition, if the high-mount stoplamp flashes when the police lights are on, the modification does not conform with Federal Motor Vehicle Safety Standard (FMVSS) 108 which requires that the high-mount stoplamp only illuminate when applying the brakes. Installation of warning lights should only be performed with a completely separate electrical system, without connection to any existing vehicle wiring. Connection of aftermarket electrical equipment into the brake lamp circuit or any other circuit which is connected to the Powertrain Control Module (PCM), anti-lock brake computer, air bag system, or any other vehicle system, will cause vehicle malfunction..."
Source: by Ford via miesk5 at MIESK5's BIG BRONCO LINKS
Brake Shift Interlock, Inadvertent Disablement TSB 99-13-9 for 94-96; "...Corporate, municipal, or police fleets may have had their 1992-1999 Ford Motor Company vehicle modified to flash the brake lamps whenever the police lights or other aftermarket lights are turned on, which may disable the brake shift interlock. The brake shift interlock is a feature that prevents the vehicle from being shifted from Park unless the brake pedal is depressed. Disabling of the brake shift interlock feature may enable the operator to inadvertently apply the accelerator instead of the brake pedal and simultaneously shift from Park to a Drive gear. ACTION: As appropriate, dealers should advise owners (including corporate, municipal, and police agencies) that any vehicle that has been modified with a connection to the brake circuit, or that electrically interfaces with the brake lamps in any manner, should be disconnected IMMEDIATELY and the emergency lighting system should be modified in a manner that does not interfere with normal vehicle operation or the brake shift interlock. In addition, if the high-mount stoplamp flashes when the police lights are on, the modification does not conform with Federal Motor Vehicle Safety Standard (FMVSS) 108 which requires that the high-mount stoplamp only illuminate when applying the brakes. Installation of warning lights should only be performed with a completely separate electrical system, without connection to any existing vehicle wiring. Connection of aftermarket electrical equipment into the brake lamp circuit or any other circuit which is connected to the Powertrain Control Module (PCM), anti-lock brake computer, air bag system, or any other vehicle system, will cause vehicle malfunction..."
Source: by Ford via performanceprobe.com
Charge Indicator Wiring Diagram in 87-89 & F Series
Source: by miesk5 at broncolinks.com/gallery
Chime/Buzzer System Symptom Chart & Pin-Point Testing in a 96 from Workshop Manual
Source: by Ford via thedieselstop.com
Clutch Interlock Switch Wiring Diagram in a 91
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
Coil Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Compass & Outside Temperature Connector C229 Pin-Out Diagram in 96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Compass & Outside Temperature Connector Pin-Out Diagram in a 94
Source: by Ken B (Kenny's 94) at SuperMotors.net
Compass & Outside Temperature Module Wiring Diagram in 96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Compass & Outside Temperature Wiring Diagram in a 94
Source: by Ken B (Kenny's 94) at SuperMotors.net
Compass & Outside Temperature Wiring Tip in a 96; "...My 96 was prewired for the console up to connector C206, which is behind the drivers side kick panel. I discovered a tip that will help some of you in hooking up to this connector if your truck is prewired for it and you come across a complete wiring harness like I did. If you disconnect the emergency brake assembly from the truck (it's only 3 nuts) and move it out of the way the connector will be right there behind it. I was able to slide the end of the factory wiring harness in through the gap created by the base of the A pillar, windshield and dashboard which allowed it to drop right through to the connector already in my truck. Click them together and that's it for the wiring, total time for console wiring, 10 minutes..."
Source: by Fishallot at FSB
Connector & Ground Location Diagram (partial) in 92-96
Source: by fordbronco1995 ("JUICE") at FSB
Connector Location Diagram in a 94 (part of overhead console wiring diagram series); C911 (left vanity mirror lamp), C1048 (E4OD), C913 (day/night mirror auto-lamp sensor), C271 (inertia fuel shut-off), C223 (electronic shift control module), C1012 (MLPS), C1020 ($r70W output shaft speed sensor), C1049 (4R70W), C328 (safing sensor), C404 (DSS/VSS/ABS rear axle sensor), C417 (trailer lamps), C440 (fuel level sender), C220 (to transfer case), C 117 (C6), C127 (neutral safety switch NSS), C161 (hi/low indicator switch), C510 (left front door disarm switch), C299 (RABS valve assembly), C1012 (MLPS), C117, C1025 (C6 for (7.5 & 5.8 over 8500 GVW only), C440 (front fuel tank pump/sending unit Gasoline engines) , C421 (front fuel level tank sending unit Diesel), C403 (chassis cab & 185 in wheelbase only), C427 (rear tank fuel level sender Diesel only), C441 (rear tank fuel level tank sending unit Diesel), C441 (rear tank pump/sending unit chassis cab & 185 in wheelbase only)
Source: by Ford via Ken B (Kenny's 94) at SuperMotors.net
Connector Location Diagram, Engine Area in a 91 4.9
Source: by Ford via chiltonlibrary.com
Connector Location Diagram, Engine Area in a 92 5.0 & 5.8
Source: by Ford via Jem270 at Supermotors.net
Connector Location Diagram, in 92-96 (part of Keyless Entry Wiring Diagram for 92-96; scroll to the right); C200, C1048 (E4OD), C911 (left vanity mirror lamp), C271 (inertia fuel shutoff, C268, C509, C203, & C228, C912 (right vanity mirror lamp), right power mirror, C601 or C608, C404 (rear axle sensor-VSS/ABS), C311 & C310 (rear window defroster), manual transmission, C166 (back-up lamp switch), C117, C441 (fuel pump module), C429 (tailgate power window switch), tailgate window switch, C428 (tailgate latch switch, key operated), G401, C209, G200, C213, C221/C222/C223 (electronic shift control module), C220, transfer case assembly, to C161 (4x4 high/low indicator switch), C1020 (BW 1356 Electric Shift on the Fly transfer case (ESOF) output shaft speed (OSS) sensor location), C1012 (transmission range sensor(TR/MLPS), C214, C504 (left door courtesy lamp), C502 (left door lock motor), C503 (window/door lock control switch master, left), C500 (left window motor), C507 (left door speaker)
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Connector Location Diagram, in a 94 (part of Overhead Console Compass & Temperature Display Wiring Diagrams)
Source: by Ford via Ken B (Kenny's 94) at SuperMotors.net
Connector Locations in an 84; C101 at batty ground pigtail; C105 at ignition module; C121 below junction block; C128 near dual brake warning switch; C208A attached to instr cluster; C221 at radio noise capacitor near ign. coil; C230 front of eng. near distributor; C311, C321 & C325 LH fender apron near ign. module; C322 at distributor; C323 at ign. module; C327 behind center of IP; C332 fwd of RH side of dash panel; C352 near TPS; C1983 near BAP
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Console, Overhead Display Flicker Repair; "... my overhead console display started flickering and then went out completely. I disassembled the console module that houses the board and display, I noticed the faint smell of something that had burnt. I also noticed that the 5 pin heatsinked voltage regulator (ST brand L4947H www.st.com) was dissapating quite a bit of heat when powered. Using a meter and the spec sheets on the two regulators (the other was LM2940CT-12 or NTE1954) I noticed that the output from the L4947H was around 2 volts where it should have been 5 volts. Noting the amount of heat being dissapated and the low voltage reading, I determined that another component must have failed. I started looking at the nearest component which was a 100uF 6.3 volt electrolytic capacitor. Closer inspection revealed some brown crud under the bottom of it which meant that the capacitor had failed. I dug around in some spare parts and found a 100uF 16 volt capacitor which I installed in the circuit. Put the console back together and display is working fine.." READ MORE
Source: by kc5mhb at FSB
Console, Overhead Wiring Diagrams
Source: by Ken B (Kenny's 94) at SuperMotors.net
Courtesy, Inside & Outside Cargo Area, High Mount Brake, Map, & Dome Lamp Wiring Diagram in a 92
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Cruise (Speed) Control Wiring Diagram for 88.5-89
Source: by Reptillikus (Project 4D2, Kevin W) at SuperMotors.net
Cruise (Speed) Control Wiring Diagram in 93-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Dash Harness pic in a 96 F 150; "...some connectors have been removed..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Daytime Running Light (DRL) Module Location Diagram in 92-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Defroster Wiring Diagram (color codes are correct)
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Defroster Wiring Diagrams for 78-86 & 87-96
Source: by Ryan M (Fireguy50) at FSB
Diagram in an 81 F 150
Source: by Chilton via miesk5 at FSB
Diagrams in an 86; Fuse Panel, Ignition & Light Switches, Instrument Cluster, etc.
Source: by Xris at SuperMotors.net
Dimmer High & Low Headlight, Flash-to-Pass, Hazard, Multi-Function Switch (MFS), Turn & Brake Light Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Dome Light Circuit Wiring Diagram & Testing in 92-96; "...The only significant difference between '92-96 and '80-91 is that the MFS's DIMMER switch replaced the older beam select switch, but they perform the same function..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Dome, Map & Courtesy Light Wiring Diagrams from 1996 F-150, F-250, F-350, F-Super Duty Chassis Cab and Bronco Vehicles Workshop Manual
Source: by Ford via thedieselstop & miesk5 at FSB
DTC 172, 173 or 41 for HO2S Failure Or Fuse "E" Inoperative, ABS Light On, Back-Up Lamps Inoperative, DRLs Inoperative, MIL On, Inadvertent Self-Test, Speedometer Inoperative & Trailer Battery Charge Relay Inoperative in TSB 95-5-21 for 92-95 Bronco & F Series; "...the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed and the vehicle could exhibit any one of the following conditions....Lack of proper HEGO operation may cause, or be the result of a rich or lean fuel condition, which could cause additional heat in the catalyst. Perform self test KOEO and KOER, service any codes. CHECK FOR PROPER HEGO GROUND. If the HEGO ground is good, the following areas may be at fault: ..." READ MORE
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
DTC 22 - Manifold Absolute Pressure (MAP)/Barometric Pressure (BARO) sensor is out of Self-Test range. Testing & Diagrams; "...Correct MAP/BARO range of measurement is typically from 1.4 to 1.6 volts...." READ MORE
Source: by miesk5 at Ford Bronco Zone Forums
DTC 51 Air Bag Diagnostic Monitor Internal Thermal Fuse,Fuse Blown Due to Intermittent Short to ground; "...In the diagram see the Note: "This shorting bar in the gray diagnostic monitor harness connector, Remove the plastic wedge in the gray connector before checking circuit 824 or 817 for a short to ground." Now, I believe the ckts should be 624 or 617. for da Clock Spring/etc. ckt & Front Sensor ckts..." read more
Source: by Ford via miesk5 at Ford Bronco Zone Forums
DTC 522 & 654 indicate the gear selector was not in Park during Self-Test; "...Possible causes: Misadjusted linkage. Open or short in harness circuits. Damaged TR sensor. Damaged Powertrain Control Module (PCM) . OR CHECK THIS OUT, TECHNICAL BULLETIN # 230A, TRANSMISSION: E4OD SUBJECT: No upshift 4th gear starts, harsh upshifts, neutrals out after shifts APPLICATION: Ford-E/F Series, Bronco DATE: Jan 1995 NOTE: Click on image to make it larger. All of these concerns can be the result of an inappropriate Manual Lever Position (MLP) sensor signal. The MLP sensor consists of six resistors connected in series (ganged). The resistance of the MLP sensor will vary based on which range the transmission is in. The MLP circuit can be checked using the following steps. (Step 1) Check the MLPS ground: Turn the ignition on. The voltage on pin 46 (sensor ground ) should not exceed .1v. If the voltage is excessive, add an additional ground to the existing ground wire (figure 2). NOTE: Click on image to make it larger. Figure 2 Splice an additional ground from the existing ground wire to a known good ground.The negative post of the battery is the best. This view is of the pins of the MLP connector pins. NOTE: Click on image to make it larger. (Step 2) Check the MLPS voltage: The voltage at pin 30 should vary-in increments- according to the position of the manual lever (figure 3). MLP voltage (ignition on) should be within 20% of these specifications. Note It is recommended that you use a break-out box. If a break-out box is not available, you will need to pierce the wires to pins 30 and 46 for these tests. NOTE: Click on image to make it larger. (Step 3) Check the resistance of the MLPS: The resistance of the MLPS (pins 30 and 46) should change-in increments-with the position of the manual lever (figure 4). Note If this test is being done with a break-out box, disconnect the computer first (make sure the ignition is off). If this test is being done without a break-out box, disconnect the MLPS from the vehicle harness. Note Testing beyond this point will include tests of the harness. Consult the appropriate repair manual for this..."
Source: by fordbronco1995 ("JUICE") at FSB
DTC 556 (O,M) Fuel pump relay primary circuit fault in a 90 4.9 F 150; "...You will need to trouble shoot the circuit to see if it is a EEC or FP relay, the inertia switch or corroded wiring, relay sockets, etc. The fuel pressure should be in the 45-60 psi range.Fuel Pressure Regulator (FPR) Delay TSB 93-22-14 for 90-93 4.9L (Cold Start & Idle Stall)..." READ MORE
Source: by miesk5 at Ford Bronco Zone Forums
DTC 64 Intake Air Temp (IAT)/ (Air Charge Temperature (ACT) prior to 1992); sensor out of range (signal voltage too low), sensor is bad/dirty or wiring is grounded
Source: by miesk5 at FSB
DTC 67 & 634 indicate the MLP sensor is out of Self-Test range when the gear selector is in PARK; "...Possible causes: Misadjusted linkage. Open or short in harness circuits. Damaged MLP sensor. Damaged PCM. miesk5 NOTE;... for Escort/Tracer tranny MLPS etc.; but the Bronco troubleshooting process will be similar exc for connector pins, etc. read more on testing
Source: by Ford via thedieselstop.com
DTC 67 & DTC 634; Manual Lever Position/Transmission Range (MLP/TR) Sensor Pin-Point Test in 92-96; from Ford EVTM; "...Check the resistance of the MLPS: The resistance of the MLPS (pins 30 and 46).." read more
Source: by Ford via alldata & justanswer.com
E4OD Connector Diagram
Source: by fordfuelinjection.com
E4OD Manual Lever Position Sensor (MLPS) Wiring Diagram in a 95 Bronco; from Ford EVTM
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
E4OD MLPS Sensor Connector Diagram
Source: by Ryan M at fordfuelinjection.com
E4OD Solenoid Pack Connector; "...Be careful with the different connectors. The early E4OD solenoid packs had diodes in built into the pack to prevent the voltage spike for the collapsing magnetic field of the solenoid from cooking the computer. In the later (I can't remeber which year, I think 94?) Ford removed the diodes from the solenoid pack in the trans and added protection in the computer. If you end up with a late solenoid pack and an early computer you will likely be buying a new computer. Going from memory which is a couple years old now, the early solenoid packs had a redish orange seal in the electrical connector on the transmission side, the later solenoid packs without diodes have a green seal which goes into the vehicle side harness. I the plugs don't easily plug in wrong, but if you really try you can..."
Source: by heeke via miesk5 at FSB
E4OD Transmission Control Indicator Lamp (TCIL) Flashing because wiring may be misrouted causing a short in the steering column and a blown #17 fuse in TSB 92-22-5 for 92 Bronco & all Light Trucks
Source: by miesk5 at FSB
E4OD Transmission Control Indicator Lamp (TCIL) Flashing because wiring may be misrouted causing a short in the steering column and a blown #17 fuse in TSB 92-22-5 for 92 Bronco & all Light Trucks
Source: by Ford via Chilton
E4OD Transmission Control Indicator Light (TCIL) & Switch Wiring Diagram in a 91 Bronco; from Ford EVTM
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
E4OD Transmission Control Indicator Light (TCIL) & Switch Wiring Diagram in a 95 Bronco; from Ford EVTM
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
E4OD Transmission Control Indicator Light (TCIL) Troubleshooting in 92-96; "... need to look for my notes on what fuse blew. think it was 6 or 7 due to a harness short under steering column that affected the OD Cancel Light (it blinked randomly, no Trouble Codes or tranny malfunctions though)..."
Source: by miesk5 at FSB
E4OD Transmission Control Indicator Light (TCIL) Troubleshooting in 92-96; "... Several different complaints concerning the overdrive cancel indicator may occur due to a faulty O/D cancel LED. At times the light may simply fail to light, flicker erratically, or glow very dim. Tapping the shift knob lightly may affect the operation of the LED, causing it to work temporarily. These complaints are usually due to a faulty O/D indicator LED. To replace the LED carefully pry the cap off the end of the shifter and pull the LED/switch out. Slide the new switch into position and snap the cap back on. Note: Don’t confuse the above conditions with a steady flashing pattern of the O/D cancel light. A steady rhythmic flashing pattern indicates a malfunction has been detected by the computer.; Part #F58Z-7G550-A..."
Source: by ATC-Distribution Group Inc. atcdg.com via web.archive.org
E4OD Transmission Control Indicator Light (TCIL) Troubleshooting in 92-96; "... The flashing OD light is an indication of a transmission related trouble code in the Powertrain Control Module (PCM). When it has a trouble code related to the transmission it usually commands full line pressure to try to protect the transmission from damage. Normally this is caused by a transmission slip code. Have your computer scanned to see what transmission codes are stored. If it is a torque converter slip code keep in mind it could be stored from converter clutch slippage, or slippage in another transmission clutch pack ..."
Source: by Baumann Electronic Controls, LLC becontrols.com
E4OD Transmission Control Indicator Light (TCIL) Troubleshooting in 92-96; "...check the wires coming out of the shifter handle, I have had several trucks have those wires short out and cause some strange symptoms. Just pull the plastic cover off the top of the column and take a look, it's pretty obvious when it happens..."
Source: by jrainw at fte
E4OD Transmission Control Indicator Light (TCIL) Troubleshooting in 92-96; "...This symptom could be caused by a couple of problems. One is the transmission is malfunctioning. The bulb in the switch at the end of the shifter is flaky. The wire that connects the OD switch/light at the end of the shifter is being worn at the column. Process of elimination. Codes to the computer and the light flashing in a "repetetive pattern" and consistent manner indicate a trani malfunction. A flashing OD light that is sporatic, has no pattern, is accompanied by a also sporatic OD engagement indicated that the wires are being worn and possibly shorted at the column. This is a common problem with these. The light flashing in a sporatic and sometimes on and sometimes off for longer periods indicated a bad switch at the end of the column. (my case) Hope it is one of the easier ones. (Switch light or wires at column)..."
Source: by Mr P at rv.net via web.archive
E4OD Transmission Oil Temperature Sensor (TOT) Overview & Wiring Diagram; "...The PCM monitors the voltage drop across a temperature sensitive thermistor. The PCM uses this information to determine transmission fluid temperature for adjustment of shift schedules & torque converter engagement schedules when the fluid is cold. Also used to adjust EPC pressure shift & torque converter schedules for temperature..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
E4OD Wiring Diagrams in a 96 Bronco & F 150
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
E4OD Wrong Gear Starts, TCC hunting, No 4th gear, Engine Stalling, High or Erratic Line Pressure or a Neutral Condition & Seldom Stores a DTC 67 or 634; "...One of the most-difficult problems to diagnose on a Ford car or truck is a sudden neutral condition while the vehicle is cruising in 4th gear. Now this can have a number of causes, depending on which transmission is in the car or truck, but the cause we are going to discuss here is that #(~! *&A% Manual Lever Position Sensor – that’s right, the old MLPS. This sensor is responsible for more malfunctions than any other sensor in the system, and the kicker is that it seldom stores a code 67 or 634. Actually there is a standing joke in our industry that says, “You got a problem with a Ford, change the MLPS; it fixes everything,” which ain’t that funny because it’s not that far from the truth. Some of the problems the MLPS can cause are wrong gear starts, TCC hunting, no 4th gear, engine stalling, high or erratic line pressure and the problem that this article is about – a sudden neutral condition. Whether the MLPS is attached to an E4OD, AXODE, AODE or CD4E, the operating characteristics are the same. What that means is the MLPS is classified as a step-down resistor. The MLPS is supplied 5 volts from the computer as a reference voltage, and as the shift lever is moved from park toward manual low, the voltage in each gear-shift position will decrease as shown in Figure 1. The MLPS also can be checked for correct resistance, also shown in Figure 1. This way, if the resistance checked good on the bench but the voltage does not check good in the vehicle, you know there must be a wiring or ground problem. I know what you are thinking: You replace the MLPS on every job you do, so why should you check the resistance on a new part? Well, that’s fine, but one thing has become very clear lately: NEW DOES NOT MEAN GOOD! Now, let’s get to the meat of the problem. As you can see in Figure 1, the voltage in the drive/overdrive position can be 1.88 to 2.30 volts. The O.D. Cancel button, on those vehicles equipped with one, has no effect on the voltage seen in the drive position, nor does it matter whether the vehicle has a gas or diesel engine. This would be the voltage seen in the D or D position if it were available on the scan-tool screen in the data mode. Unfortunately, this information is not always available, and this “glitch” may occur faster than the scan-tool’s update capability so the voltage jump would be missed. Therefore, a digital multimeter must be used to monitor this voltage. This is of the utmost importance in diagnosing the sudden-neutral condition. This voltage should be monitored when the neutral condition occurs by placing the multimeter’s positive lead to computer terminal 30 if it is an EEC-IV system, as illustrated in Figure 2, or to terminal 64 if it is an EEC-V system. This wire is light blue/yellow on all applications except vehicles with the CD4E. On these the signal wire is red/black. Now, here is where this gets a little involved. The negative lead of the multimeter should be placed at the MLPS signal-return ground terminal at the MLPS. The reason is that the ground circuit for the MLPS can be shared by as many as FIVE other sensors, as seen in the wiring diagram in Figure 2. This means that there are factory splices in this ground circuit. If you check this ground at computer terminal 46 for the EEC- IV or computer terminal 91 for the EEC-V, the ground may check good but could be bad at the MLPS if there is a problem on the MLPS side of the splice, as also can be seen in the wiring diagram in Figure 2. The ground-circuit wire for 1989-90 F- and E-series trucks is black/white; all other vehicles use a gray/red ground wire except for CD4E applications, on which the ground wire is black/blue. Once the multimeter is connected to these circuits, as seen in Figure 3, place the meter where it can be seen while driving. When the transmission suddenly neutrals, be sure to have someone observe the multimeter, or use the meter’s MIN/MAX feature to record the highest and lowest voltage readings that occurred in the circuit. If the voltage jumps toward 3 volts as shown in Figure 3, and at that very moment the transmission neutrals, either the MLPS is faulty or the MLPS ground circuit is poor. Under normal conditions, this voltage reading SHOULD NOT CHANGE! When the voltage jumps toward 3 volts, this indicates a neutral-shift- lever position to the processor. This confuses the computer’s logic system, and therefore the computer is unable to fire the shift solenoids correctly (I think), and – BAM – you have a sudden-neutral condition. Why does the voltage jump because of a poor ground? The poorer the ground, the higher the resistance will be in that ground circuit. The higher resistance will cause the voltage in the overdrive or drive position to rise toward the 5-volt reference voltage, much like putting a bend in a garden hose would raise the pressure in the hose behind the bend. Ground- circuit integrity can be verified by placing the positive multimeter lead to the MLPS ground terminal at the MLPS and the negative multimeter lead to the negative battery post, as seen in Figure 4. With the multimeter set to DC volts and the engine running, the maximum voltage should be 0.1 volt. If more than 0.1 volt is seen on this ground circuit, it is NOT a good ground. In order to correct this condition, cut the ground wire close to the MLPS, attach it to a known good ground and recheck as previously described. Two things must be remembered here. One is that the return electricity will seek the path of least resistance. This path MUST be the ground circuit, NOT your multimeter. That’s why you should see a maximum of 0.1 volt on any 5-volt-reference ground circuit; 0.3 is acceptable on a 12-volt-reference voltage supply. The second thing to remember is that most electrical- fault phone calls I receive on the ATSG helpline are ground-related problems, so be sure to use the voltage-drop method of checking grounds as described. It may help to prevent you from falling into this trap..." See Diagrams & instructions
Source: by Pete L at transonline.com
EEC & Fuel Pump Relay Color Codes for Troubleshooting/Swapping to Bosch Style Relays
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
EEC & Fuel Pump Relay Swapping to Bosch Style Relays & Color Codes in all pre-'92 EFI Bronco & F-series; "...Working on ONE relay at a time, remove the terminals from the stock connector & discard it. I collected these Bosch-style sockets in junkyards, but they're available at most parts stores, from Ford, or several online suppliers like RJMInjectionTech.com as crimp-on kits for a near-factory look. Being careful to connect the wires to the proper terminals (using the list below), securely connect the old wires to the terminals of the new sockets. Try to keep the wires the same length so there's not a huge ratnest. EEC PWR 30 - Y (battery always 12V) 87 - Bu, DB, R (out to EEC) 85 - Wh/LB, R/LG (12V in from ig.sw.) 86 - Bk/LG, Bk (ground); FP: 30 - Y (battery always 12V) 87 - Pk/Bk, Br, DG/Y (out to inertia sw.) 85 - R (12V in from EEC PWR relay) 86 - T/LG, LB/Or (ground from EEC)...It's OK to reverse 30 with 87, or 85 with 86 on either relay. It's possible to just use common insulated flat blade terminals to connect the bare wires to the relay terminals without a socket, but it's not as secure or convenient. Now the truck will be MUCH more reliable, and can use the cheaper, heavier-duty, more common ISO relays that are easier to swap. Tape up the harness & secure the relays to a safe mounting location. Not all relays have mounting tabs like these, but the sockets or harness can be zip-tied to something solid..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
EEC Ground Location pic in an 89; "...Those wires eventually connect back to the EEC case (which is grounded) and the pins on the connector that need to be grounded...but then again every ground connects to each other on a Bronco..."
Source: by kf4amu (Will H, The Beast) at FSB
EEC IC ECM (A9x and same years ECM's) Failures Due to Age; "...The patient in question is a remanufactured A9L unit. This ECM is the one from a little notch project I'm working on. It started giving some problems starting up, engine flooding, random hesitation, missing and stalls. I opened up the ECM (the car is running with a A9S unit) after the owner brought it for a checkup.What you see is the typical electrolytic capacitors leak, causing intermittent shorts/opens to the neighboring circuits/components and symptoms as the ones explained. Worst case scenarios with this type of failure, is a permanent no start and permanent damage to the PWB preventing it could be repaired. As soon as I replace the capacitors I'll update with the pictures showing the repairs. The following capacitor does not show any leakage problems however, it will also be replaced as a preventative measure..." read more
Source: by Joel5.0 at sbftech.com
EEC IV Pin Outs, Bronco & Ford Truck & Van: 4.9, 460, 5.0, 5.8
Source: by Ryan M (Fireguy50) at Ford Fuel Injection
EEC IV Pin-Outs (Partial) in 88-89 & 90-91 Bronco 4.9; 88-90, 91 & 92-93 Bronco 5.0; 88-91 & 92-93 Bronco 5.8; Looking Into Harness Connectors in Ford Electronic Engine Control Overview, Chapter 12, of Ford Fuel Injection and Electronic Engine Control: How to Understand, Service and Modify, 1988-1993
Source: by Charles O. Probst via yunost.ru
EEC IV Self Test - & Connector Pin-Out Diagram in 87-95; "...The self-test plugs were mounted on the passenger side fender on 1985-86 EFI trucks; The self-test plugs are located along the driver's side fender behind the air filter box on 87-95 EFI trucks..."; miesk5 NOTE; Self-Test Input (STI) is the Pin in the Lt gray Connector and Signal Return Ground (STO/SIGRET) is Pin E in black Connector in 87-95; The engine temperature must be greater than 50°F (10°C) to pass the KOEO Self-Test and greater than 180°F (82°C) to pass the KOER Self-Test. Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accesories/lights, etc. Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch. Do Key On Engine Off (KOEO) portion first. Look Codes up in my broncolinks.com site using the new Search function.
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
EEC IV Self Test Connector pic in a 95 (near driver's side hood hinge)
Source: by s8c2 (the wagon) at SuperMotors.net
EEC IV Ten Pin Connectors; These connectors are notorious for developing poor connections and causing strange EEC quirks, like idle fluctuations, check engine lights, & unexplainable diagnostic codes to be triggered.
Source: by FORDMUSCLE
EEC Relay Location in Power Distribution Box Diagram in a 96 Bronco & F-Series
Source: by Ford via thedieselstop.com
EEC Relay Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
EEC Relay Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
EEC Relay Wiring Diagram in an 86 5.0
Source: by Ryan M (FireGuy50) at fordfuelinjection.com
EEC Relay Wiring Diagram in an 89 5.0, 5.8 & 7.5
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
EEC V (OBD II) Connector Pin-Out Diagram & Overview; "...EEC-V uses a new 104-Pin connector to accommodate more sensors and actuators to help it grow beyond just engine and transmission control. The new EEC also had to apply to newer 1996 government regulations, these were labeled as �On-Board-Diagnostics II,� and they required a new test plug called the Diagnostic Link Connector. All brands sold in the USA had to use the same test connector, and it has to be within reach of the driver�s seat..."
Source: by Fireguy50 (Ryan M) at fordfuelinjection.com
EEC Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
EEC-IV Connector Pin-Out Diagram & Overview
Source: by Fireguy50 (Ryan M) at fordfuelinjection.com
EEC-IV Pin-Outs
Source: by Fireguy50 (Ryan M) at fordfuelinjection.com
EEC-IV SELF TEST - COMPREHENSIVE & Connector Location pic, Bronco & Ford; "...The self-test plugs were mounted on the passenger side fender on 1985-86 EFI trucks; The self-test plugs are located along the driver's side fender behind the air filter box on 87-95 EFI trucks..."; miesk5 NOTE; Self-Test Input (STI) is the Pin in the Lt gray Connector and Signal Return Ground (STO/SIGRET) is Pin E in black Connector in 87-95; The engine temperature must be greater than 50°F (10°C) to pass the KOEO Self-Test and greater than 180°F (82°C) to pass the KOER Self-Test. Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accesories/lights, etc. Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch. Do Key On Engine Off (KOEO) portion first. Look Codes up in my broncolinks.com site using the new Search function.
Source: by dabranco at FSB
EEC-IV Self Test Connector Pin-Out Diagrams & Color Codes
Source: by miesk5 at FSB
EEC-IV Wiring Diagram in an 87
Source: by Yardape (Mavman, Yard Ape) at broncozone.com
EGR Vacuum Regulator (EVR), Thermactor Air Bypass (TAB) Solenoid (AIRB) & Thermactor Air Diverter (TAD) Solenoid (AIRD) Wiring Diagram in an 89 5.0, 5.8 & 7.5. Diagram #2
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
EGR Valve Position (EVP) Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Electric Fan Test Circuit Diagram in an 86
Source: by Sixlitre (Malcolm H, Eddie Bauer) at SuperMotors.net
Electric Fan Wiring Diagram in an 83
Source: by Gremlin at SuperMotors.net via web.archive.com
Electric Fan Wiring Diagram in an 83
Source: by Steve83 (Steve, That dirty old truck) at FSB
Electric Fan Wiring Diagram in an 83
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Electric Fan Wiring Diagram in an 89 5.8 (SOLD, but Brian is keeping his info available
Source: by Brian S at FSB
Electric Fan Wiring Diagram, Lincoln Mark VIII in an 89 5.8 (SOLD, but Brian is keeping his info available
Source: by Brian S at FSB
Electric Fan Wiring Diagram, Lincoln Mark VIII Single Fan in a 93
Source: by Froggmann (Ken P) at froggmann.com
Electric Fan Wiring Diagram, Taurus in a 79
Source: by Nick B at SuperMotors.net
Electric Fan Wiring Diagram, Taurus in a 90
Source: by 90Beater (Topher, Chris) at bronco.tophersworld.com
Electric Fan Wiring Diagram, Taurus in a 90
Source: by 90Beater (Topher, Chris) at FSB
Electrical and Vacuum Troubleshooting Manual (EVTM) for an 86 (Partial); Speed Control on pages 135-139, A/C & Heater on pages 140-145, Radio on pages 127-129
Source: by Ford via Chris B (Blue, bronco boy) at telus.net
Engine Wiring Diagram 94-95 F-Series & Bronco 5.0L
Source: by seijirou at SuperMotors.net
Erratic Gauges in 78-86; "... believe the 87 (88 for sure) and later Fords do not use an IVR. They use a system of small coils built into the gauge and depend on variable voltage sending units to function. Best indication of a bad IVR use to be the temp and fuel gauges performing radically at the same time since the constant voltage side of the gauges were receiving a wrong or intermittent voltage..."
Source: by Mulletwagon at fte
Erratic Gauges in 78-86; "...The cluster "Instrument Voltage Regulator (IVR)" is going bad, and staying on too long, sending too much current through the gauges & sensors. It has finally locked on, and is burning out your sensors every time you turn your key on. :( Remove the instrument cluster and then pop the VR off the film circuit - it's a metal box with 2 brass snaps. They're available at most parts stores for a few bucks. The hardest part will be getting the headlight & wiper knobs off, so post again if you need instructions on that.In this photo, counting from the RIGHT, it's between the 2nd & 3rd black bulb holders along the top of the cluster. You can see the hex screw holding the mounting tab, and just below that, you can see the 2 brass snap terminals..."
Source: by Steve83 (Steve, That dirty old truck) at FSB
Flash-to-Pass, Hazard, Multi-Function Switch (MFS), Turn, Dimmer High & Low Headlight & Brake Light Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuel Gauge Sender Wiring Diagram in 90-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuel Pump & EEC (PCM) Relay Wiring Diagram in a 95 (see#3)
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Fuel Pump & Inertia Cut-Off Switch Relay Wiring Diagram in a 95 (see#4)
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Fuel Pump & Relay Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Fuel Pump Relay & EEC Relay Color Codes; for troubleshooting/swapping to Bosch Style relays
Source: by Steve83 (Steve, That dirty old truck) at FSB
Fuel Pump Relay Swap Wiring to Bosch Type in all pre-'92 EFI Bronco & F-series
Source: by Steve83 (Steve, That dirty old truck) at FSB
Fuel Pump Relay Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuel Pump Relay Wiring Diagram in an 89 5.0, 5.8 & 7.5
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Fuel Pump Selector Switch Testing in a 90 F 150 w/Dual Tanks & Pumps
Source: by Ford via subford (Bill K) at fte
Fuel Pump Test & Diagram at the Diagnostic Link Connector in 84-95; "...Connect FP Relay to any ground to force the fuel pump(s) on when the key is in RUN..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuel Pump, Level & SenderConnector; "...The larger surface-mounted connector (WPT454) was used until '93; in '94, it switched to the smaller round inline connector. (Pump side: WPT330/WPT335; Truck side: WPT111/WPT807/WPT81..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuel Pump, Level Sender Ground Location in 92-96; "... pump and fuel level sender share a ground) At Rear cross member..."
Source: by miesk5 at Ford Bronco Zone Forums
Fuel Pump, Relay, Inertia Switch & Fuel Gauge Level Sender Wiring Diagrams in 86 (INCLUDES BRONCO & Single Tank F 150); 89 (INCLUDES BRONCO & Single Tank F 150); 91 (INCLUDES BRONCO & Single Tank & Dual Tanks & Pumps F 150) & 95 F 150 w/Dual Tanks & Pumps
Source: by Ryan M (FireGuy50) at fordfuelinjection.com
Fuel System Wiring Diagram in a 90 F 150 w/Dual Tanks & Pumps
Source: by Ford via subford (Bill K) at photobucket
Fuel System Wiring Diagrams & Component Location Diagrams in 86-96 Bronco & Fords; Agree and enter year, make/model, etc..
Source: by Airtex at showmetheparts.com
Fuse "E" Inoperative could exhibit any one of the following conditions: ABS Light On, Back-Up Lamps Inoperative, DRLs Inoperative, MIL On, Speedometer Inoperative, DTC 172, 173 or 41 for HO2S Failure in TSB 95-5-21 for 92-95 Bronco & F Series; On some vehicles the HO2S wires in the 12A690 (subassembly of the 14B060 battery cable) harness may become chafed READ MORE
Source: by Ford via Chilton
Fuse 17 Blown, Short Circuit The transmission control switch wiring may be misrouted causing a short in the steering column and a blown # 17 fuse. The following symptoms may be associated with this concern; Early shifts, Loss of power, Poor acceleration, 3-4 shift cycling, Transmission control light cycling ON/OFF or inoperative, Transmission control switch inoperative, Rear Anti-Lock Brake System (RABS) electronics (dash lights on, etc.) inoperative, Loss of instrumentation (tach, fuel gauge, etc.), Unable to read Self-Test codes (solid tone only)
Source: by miesk5 at FSB
Fuse Block & Power Distribution Box Diagram in a 92 Bronco & F-Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuse Block & Power Distribution Box Diagram in a 94 Bronco & F-Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Fuse Block Diagram in a 78
Source: by highhorse78 (High Horse) at FSB
Fuse Block Diagram in a 78
Source: by highhorse78 (High Horse) at SuperMotors.net
Fuse Block Diagram in a 96
Source: by Roadkill (The Beast) at SuperMotors.net
Fuse Block Diagram in an 85 (register to view)
Source: by Tim O (RED WAGON, redwagon) at FSB
Fuse Block Diagram in an 88
Source: by Jem270 at SuperMotors.net
Fuse Block Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Fusible Link A, F, I, J, L, N, M, P & Location in a 92 4.9
Source: by Ford via chiltonlibrary.com
Fusible Link A, J & S Location Diagram, Engine Area in a 92 5.0 & 5.8
Source: by Ford via Jem270 at Supermotors.net
Fusible Link at Ignition Switch and Alternator to Battery Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Fusible Link: A-Brown 18ga to Rear Window Defroster; W-Blue 20g to Fuel Pump Relay; N-Blue 20g to EEC Power Relay; F-Blue 20ga to Trailer; Y-Blue 20ga to N.C.; L-Brown 18ga to ?; M-Brown 18ga to ?;G-Blue 20g to Exterior Lamps, Trailer; P-Blue 20ga to ?; & J-Green 14ga to Alternator as shown in Wiring Diagram in an 89
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Ground Location pic, G201 in a 92 (driver kick panel); Note by Steve83; "...that's G201 which is for all the windows, courtesy lights, instrument cluster, lighter sockets, blower, & horn switch. Instead of many wires at the ring like I was remembering, they spliced them together in the harness that year..."
Source: by BeastBronk at FSB
Ground Locations in an 84; G203 RH side of engine; G208 near TPS; G209 forward of RH side of dash panel; G701 behind IP near LH side of radio; G757 front of engine near distributor
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Grounds, G101, G103, G104 Location in Engine Area Diagram in a 92 5.0 & 5.8
Source: by Ford via Jem270 at Supermotors.net
Haynes Wiring Diagrams for 87-89 Bronco & F series
Source: by equivalent (Beetlejuice) at SuperMotors.net
Hazard & Turn Switch Wiring Diagram in an 86
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Hazard, Turn, High & Low Headlight Dimmer, Flash-to-Pass, Multi-Function Switch (MFS) & Brake Light Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Head Light & Switch Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Headlamp Switch On Warning (Available on Some Models) Overview in a 96 from Workshop Manual; "...The warning chime/buzzer sounds when the headlamp switch (11654) is in PARK or HEAD and the driver's door is open, and continues to sound until the headlamp switch is moved to OFF or the door is closed. When the headlamp switch is in PARK or HEAD, power is supplied through Circuit 14 (BR) to the module. When the driver's door is open, the driver's door lamp switch (13713) is closed and power is supplied to the module through Circuit 159 (R/PK)..."
Source: by Ford via thedieselstop.com
Headlight & Daytime Running Lamps (DRL) Overview, Adjustment, Repair & Wiring Diagrams in 92-96
Source: by Ford via thedieselstop.com & miesk5 at FSB
Headlight & Parking Lights Switch Color Codes and Pic in a 90
Source: by Worthy at FSB
Headlight Delayed-Exit Installation in a 90
Source: by M.L.S.C. at FSB
Headlight Switch Connector Wiring Diagram in a 96 from 1996 F-150, F-250, F-350, F-Super Duty Chassis Cab and Bronco Vehicles Workshop Manual
Source: by Ford via thedieselstop.com
Headlight Switch Connector Wiring Diagrams in a 96
Source: by Ford via thedieselstop.com & miesk5 at FSB
Headlight Wiring Diagram & Testing in 92-96; "...The only significant difference between '92-96 and '80-91 is that the MFS's DIMMER switch replaced the older beam select switch, but they perform the same function..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Heated Back Window Grid Wire Test in a 96 from Bronco Workshop Manual; Using a strong light inside vehicle, visually inspect wire grid from outside. A broken grid wire will appear as a brown spot. Run engine at idle. Set the heated back window switch and light (18C621) to ON. The indicator lamp should come on.Working inside vehicle with Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent, contact broad (bus bars) red-brown strips on sides of rear window. The meter should read 10-13 volts. A lower voltage reading indicates a loose ground wire (pigtail) connection at grounded side of glass. Contact a good ground point with negative lead of meter. The voltage reading should not change. With negative lead of the meter grounded, touch each grid line of heated back window at its midpoint with positive lead. A reading of approximately 6 volts indicates that the line is good. A reading of zero volts indicates that the line is broken between midpoint and the positive side of the grid line. A reading of 12 volts indicates that the circuit is broken between midpoint of grid line and ground..."
Source: by miesk5 at FSB
Heated Back Window Switch Connector Diagram in a 96 from Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Heater Circuit Wiring Diagram in an 88
Source: by Dustin S (Dustball, Mellow Yellow, Mr. Laser Boy) at ylobronc.users.superford.org
Heater Wiring Diagram in a 79 w/AC
Source: by Ranger429 (Trailer Special) at SuperMotors.net
Hesitation, Stumble, Stall, Miss, No Start, No Spark and/or Diagnostic Trouble Code (DTC) 211 TSB 95-15-11 in 93-95 (Shorts in Profile Ignition Pickup (PIP) & Spark Output (SPOUT)
Source: by Ford via justanswer.com
Horn Relay Location in an 89; it looks like non-cruise 89's do Not have a Horn Relay; Look at these Haynes Wiring Diagrams for 87-89 Bronco & F series by equivalent (Beetlejuice) at SuperMotors.net; It shows; to Relay with Cruise - and to Horn Switch without Cruise;YEL-LT BLU & BK BLU @ Switch
Source: by miesk5 at FSB
Horn Wiring Diagram in a 96 from 1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Horn, Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Ignition Circuit Diagram in 87-91 (figure 3) (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forums
Ignition Lock Cylinder Adjustment & Switch Pin-Out Diagram & Continuity Testing (Logic Tables) in an 83; "...The following proceedure is from the 1983 Ford Service manual, with a few minor wording changes, but should work for any year. Also included are a couple of illustrations from the same proceedure to help you visualize it..."
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Ignition Switch Pin-Out Diagram & Continuity Testing in 87-91 (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forums
Ignition Switch Pin-Out Diagram & Continuity Testing in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Ignition Switch Pin-Out Diagrams, early & late models
Source: by Ryan M (Fireguy50) at Ford Fuel Injection
Ignition Switch Pin-Out Diagrams, early & late models
Source: by Ryan M (Fireguy50) at FSB
Ignition Switch Wiring Diagram in 87-91 (from Factory Manual and the Ford Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Broncobill78 (Dave) at Ford Bronco Zone Forums
Ignition Switch Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Ignition Troubleshooting & Wiring Diagrams in a 92 from Ford EVTM
Source: by Ford via Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Ignition Wiring Diagram in 92-96; "NOTE: Disconnecting the start wire at the starter relay with the key on will cause the TFI-IV ICM to revert to start mode timing after the vehicle is started. Reconnecting the start wire after the vehicle is running will not correct the timing. Use the ignition key only to start the vehicle for adjusting base timing."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Ignition Wiring Diagrams in an 89
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Instrument Cluster Printed Circuit in 92-96; "...The instrument cluster printed circuit (10K843) which supplies current to the instrument panel indicators, gauges, and some clocks, is made of copper foil which is bonded to a polyester base film (usually referred to as Mylar®). The instrument cluster printed circuit is mounted to the cluster housing and, due to its location, cannot be easily inspected or tested in the vehicle. This makes the instrument cluster printed circuit vulnerable to damage when a probe is used for in-vehicle testing as the probe can pierce the instrument cluster printed circuit or, in some cases, burn the copper conductor.Since there is no approved procedure for in-vehicle testing of the instrument cluster printed circuit, it must be removed for visual inspection. If no visual damage is evident, each circuit should be tested with an ohmmeter. If an open circuit or short is detected, the instrument cluster printed circuit must be replaced..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Instrument Panel Lighting Dimmer Circuit Wiring Diagram & Testing in 92-96; "...The only significant difference between '92-96 and '80-91 is that the MFS's DIMMER switch replaced the older beam select switch, but they perform the same function..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Instrument Voltage Regulator (IVR) Location pic in 78-86; "...The cluster "voltage regulator" is going bad, and staying on too long, sending too much current through the gauges & sensors. It has finally locked on, and is burning out your sensors every time you turn your key on. :( Remove the instrument cluster and then pop the VR off the film circuit - it's a metal box with 2 brass snaps. They're available at most parts stores for a few bucks. The hardest part will be getting the headlight & wiper knobs off, so post again if you need instructions on that.In this photo, counting from the RIGHT, it's between the 2nd & 3rd black bulb holders along the top of the cluster. You can see the hex screw holding the mounting tab, and just below that, you can see the 2 brass snap terminals..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Insulation Shrunk TSB 89-08-12 for 87 Bronco & F Series; "...Wire insulation may shrink away from terminals at three connectors of the 14290 wire harness. The 14290 wire harness is located on the left hand fender apron in the engine compartment. Shrinkage is caused by high ambient engine temperatures and grease filled connectors. ACTION: Check for exposed wire at the terminals and wrap with electrical tape if required. Refer to the following service procedure..." READ MORE
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Intake Air Temp (IAT)/ (Air Charge Temperature (ACT) prior to 1992) Overview & Testing; "...This measures the temperature of the air entering the engine. Which impacts the fuel ratio; the cooler the incoming air is the denser it is. Denser air can utilize more fuel, giving us even greater accuracy in obtaining our desired air to fuel ratio. Before you start blaming the air charge temperature sensor and replacing it make sure the rest of the coolant system is in good condition. All of the following items will affect the ACT; Coolant level, Radiator Fan, Engine Temperature..." READ MORE
Source: by Ryan M (Fireguy50) at fordfuelinjection.com
Intermittent No-Spark: Spark w/SPOUT Connector Un-Plugged, but Falter and/or No-Spark w/SPOUT Connected (similar to Hesitation, Stumble, Stall, Miss, No Start, No Spark); "It seems that the insulation around many PIP sensors breaks down prematurely - a condition that leads to shorting of the wires leading to the TFI ignition module. I always replace a PIP sensor along with a defective ignition module, if it has "soft" insulation..."; etc. (for a Ranger, but similar); Note, site won't allow you to return to this page, so open URL in a new Window; SEE Hesitation, Stumble, Stall, Miss, No Start, No Spark and/or DTC 211, TSB 95-15-11 for 93-95 (Shorts in Profile Ignition Pickup (PIP) & Spark Output (SPOUT) by Ford via Steve83 at http://www.supermotors.net/vehicles/registry/media/470468
Source: by Brian M at asashop.org
Key-in-Ignition Warning Overview in a 96 from Workshop Manual; "...The warning chime/buzzer sounds when the driver's door is open with the key in the ignition switch lock cylinder (11582), and continues to sound until the key is removed or the door is closed. When the key is in the ignition switch lock cylinder, the key-in-ignition switch is closed and ground is supplied to the warning chime/buzzer module through Circuit 158 (BK/PK). When the driver's door is open, the driver's door lamp switch (13713) is closed and power is supplied to the module through Circuit 159 (R/PK)..."
Source: by Ford via thedieselstop.com
Key-in-Ignition Warning Switch Location in Parts Break-Out Diagram in 88-91 Non-Tilt
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Keyless Entry Connector C2 Wiring Diagram in a 96 from 1996 F-150, F-250, F-350, F-Super Duty Chassis Cab and Bronco Vehicles Workshop Manual
Source: by Ford via thedieselstop.com
Kill Switch Wiring Diagrams; "...The "MAIN KILL" is best if you store the vehicle for long periods and want to keep the battery from draining, or to allow a trickle charger to work. The disadvantage is that all the memories (radio stations, clock) will be lost immediately. The "STARTER DISABLE" will allow the engine to continue running, but won't allow it to be started. This will preserve the clock & radio memories, and confuse most thieves since every other electrical device will work normally. It will appear that the starter is defective. "ANTI-THEFT" is even more confusing since the memory circuits will continue to function normally, but the ignition switch will appear to be defective..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Kill Switch; "...These are Hella battery switches with heavy-gauge battery wires, used on 03-up Land Rover Range Rovers & LR3s as transport cutoff switches, rated at 100A continuous; 1000A @12V for 10 sec. The battery terminals are unusual, but also high-quality. The wire with the post is about 17" and the other is about 28". The switch is on when the red key is inserted, pushed in, and turned to lock. The nosepiece of the switch is 1 1/4" long from the mounting face. The wires have heat-shrink wrapping at the switch terminals, but they can be removed easily, exposing posts with nuts. Hella spec page: (see URL in Steve's site); Wal-Mart is selling the CalTerm chinese knock-off of this switch for ~$10 now..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Light, Fog, Wiring Diagram in a 95
Source: by Frank C (AKMUD) at SuperMotors.net
Lights, Auxiliary/Off-Road Installation & Wiring Tips
Source: by Ian L (stangmata, stangmata50l, Bronco) at FSB
Lights, Auxiliary/Off-Road Installation & Wiring Tips
Source: by Ian L (stangmata, stangmata50l, Bronco) at FSB
Loss of Instrumentation (tach, fuel gauge, etc.); E4OD transmission control switch wiring may be misrouted causing a short in the steering column and a blown # 17 fuse for 92-96 in TSB 92-22-5 for 92 Bronco & all Light Trucks
Source: by miesk5 at FSB
Manifold Absolute Pressure (MAP) Sensor Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Manifold Absolute Pressure (MAP)/ Barometric Pressure Sensor (BP) Testing w/DVOM that has a frequency measuring ability
Source: by assets.fluke.com
Manual Lever Position (MLPS) also called Transmission Range (TR) Sensor Connector Pin-Out Diagrams
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Manual Lever Position (MLPS) Sensor Connector Re-Pining; "...according to the connector instruction sheet that came with the new connector. wires positions by circuit # are exactly the same from old to new. there is no mention of wire color. the wires are designated by circuit # so basically one at a time take each wire out.... and put it in the same place it came out of on the new connector..."
Source: by thePUNISHER (Paul) at FSB
Manual Lever Position (MLPS) Sensor Connector Re-Pining; "...comes with a matching vehicle harness connector. The problem is that you have to remove the pins and their wires from the old vehicle harness connector. What ever you do don't pull all the pins out at the same time because you will never figure out were they go. Easiest thing to do is remove one pin at a time and re-install it into the new connector..."
Source: by miesk5 at Ford Bronco Zone Forums
Manual Lever Position/Transmission Range (MLP/TR) Sensor Connector Re-Pining in a 90; "...Here is what I have on my 1990 after MLPS Upgrade to F5TP-7F293-AA...First, look at this diagram, specifically the lower connector, for reference... Then I have as follows...#1 - Blank, #2 - Light Blue/Yellow Stripe, #3 - Black/White Stripe, #4 - Blank, #5 - Red/Black Stripe, #6 - Violet/Orange Stripe, #7 - Black/Violet Stripe, #8 - White/Red Stripe; Be advised that Red might be Pink and Violet might be Purple, it is hard to see with a flashlight. And, these wires no longer match up to my Haynes MLPS Schematic..."
Source: by Seattle FSB (SeattleFSB) at FSB
Map, Courtesy & Vanity Lamps Wiring Diagrams in a 96
Source: by Ford via thedieselstop.com & miesk5 at FSB
Map, Courtesy & Vanity Lamps Wiring Diagrams in a 96 from 1996 F-150, F-250, F-350, F-Super Duty Chassis Cab and Bronco Vehicles Workshop Manual
Source: by Ford via thedieselstop.com
Mimimum Cable Size to Use (AWG) Table
Source: motorcityreman.com
Mirror, Automatic Day/Night Connector Face Pinout (C913) Diagram in 94-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Mirror, Outside, Power Wiring Diagram in 92-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Mirror, Power Side View Wiring Diagram in a 96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Multi-Function Switch (MFS) Wiring Diagram in 92-96 Bronco & F 150; for lighting only, turn signals, head lights, hazards, etc.
Source: by seijirou at SuperMotors.net
Multi-Function Switch (MFS), Hazard & Brake Light Disengage E4OD Torque Converter Lockup in 2009 MY; miesk5 NOTE; but could be applicable to earlier years; "...Alternative connections or wiring practices are not recommended as certain modifications may result in other circuits becoming nonfunctional...Do not splice into the Powertrain System (PCM PCMV). Connecting to any component or wires to this system may adversely affect Engine/transmission operation..." read more
Source: by fleet.ford.com
Multi-Function Switch (MFS), Hazard & Brake Light MAY Disengage E4OD Torque Converter Lock-up Discussion in 92-96
Source: by members at nloc.net
Multi-Function Switch (MFS), Hazard & Brake Light MAY Disengage E4OD Torque Converter Lock-up; "...I was living with the torque converter unlocking with the R/H turn signal. And low and behold after I changed the L/H brake/turn signal bulb the torque converter stopped unlocking with the R/H turn signal. Don't ask me but it did fix it..."
Source: by Mike G & Miesk5 at Ford Bronco Zone Forums
Multi-Function Switch (MFS), Hazard, Turn, High & Low Headlight Dimmer, Flash-to-Pass & Brake Light Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Multi-Function Switch Wiring Diagram in 92-96 Bronco & F 150; for lighting only, turn signals, head lights, hazards, etc.
Source: by seijirou at SuperMotors.net
Neutral Safety Switch & Clutch Safety Switch Wiring Diagram in 87-89 & F Series (PARTIAL)
Source: by miesk5 at broncolinks.com/gallery
Neutral Safety Switch (also referred to as Back-Up Switch) Wiring Color Codes in an 85; "...This schematic has a picture of the neutral safety/backup lamp switch in the corner, and gives the wire colors for the back up lamp circuit in the schematic. The neutral safety portion of the connector has a white with pink going in,(if it was equipped with starter interrupt) and a red with light blue going out to the starter relay. Without starter interrupt, both the wires going into and out of the neutral safety switch are red with a lt blue tracer..."
Source: by Mr. EdC at justanswer.com
Neutral Safety Switch (also referred to as Back-Up Switch) Wiring Diagram in an 89 C6 (partial circuit); Red/Lt Blu from Ignition Switch to NSS and then to Starter Relay
Source: by Cucamongan (Scotty) at SuperMotors.net
Neutral Safety Switch Wiring Color Codes in a 79 C6; "...white/pink wire and Black/Red wire are for back up lights. The two red/blue wires are the neutral safety, I had to wire in a NSS on my shifter and used the other two..."
Source: by CrazyBRONCOguy at FSB
Neutral Safety Switch Wiring Color Codes in an 89 AOD
Source: by Uncle_Monkey at FSB
Neutral Safety Switch Wiring Color Codes in an 89 C6; MIESK5 NOTE; I added the ckt info here based on XRIS's 1986 Diagram; link is below; Red with Blue stripe - from IGN SW thru NSS to Starter Relay; See Page 2, it shows Red/Lt Blu from Ignition Switch to NSS Black with Pink stripe - Could be PNK/BLK from NSS to BACK-UP LIGHTS Purple with Orange stripe - PPL/ORN, based on Xris diagram is from Fuse 5 to BACK-UP SWITCH (NSS) [on page 2 of XRIS's Diagram) Red/Lt Blu from Ignition Switch to NSS Red/Lt Blue from NSS to Starter Relay /Yel from NSS to EEC PIN # 30 READ RYAN'S INFO - DO NOT hook up the EFI to the Neutral Safety Switch That is for the start circuit, between the ignition switch and starter relay. If you put 12volts on pin 30 you risk frying some circuits on the computer! You can view wire diagrams for EFI here http://fordfuelinjection.com/?p=6 Gry = Gray by buddy65; "...This might be of help. The main job of the neutral drive switch (also known as neutral safety) is to keep you from starting your engine with your automatic transmission in a gear other that park or neutral, and has nothing to do with the computer. As a second job, this NDS circuit is used by the computer (connected to pin 30) so that EEC IV can increase engine idle speed slightly when not in neutral or park - this allows the engine to run smoother at these times. I'm not sure why it is used at all for a manual transmission. Anyway, it will pump out a KOEO code 67 if pin 30 is not connected to the NDS circuit. On '88 to '91 V8 EEC wiring, all you need to do is tee the computer pin 30 wire into the NDS circuit which goes from the transmission to the ignition switch, and no more code 67. That's what I did on mine, and the code went away. I was never able to start it other than in park or neutral even though I had pin 30 connected wrong at first..."
Source: by Uncle_Monkey at FSB
Neutral Safety Switch Wiring Diagram in an 86 C6; Miesk5 NOTES; "...Red with Blue stripe - from IGN SW thru NSS to Starter Relay; See Page 2, it shows Red/Lt Blu from Ignition Switch to NSS; Black with Pink stripe - Could be PNK/BLK from NSS to BACK-UP LIGHTS Purple with Orange stripe - PPL/ORN, based on Xris diagram is from Fuse 5 to BACK-UP SWITCH (NSS) [on page 2 of XRIS's Diagram) Red/Lt Blu from Ignition Switch to NSS Red/Lt Blue from NSS to Starter Relay b]Gry/Yel from NSS to EEC PIN # 30 READ RYAN'S INFO - DO NOT hook up the EFI to the Neutral Safety Switch That is for the start circuit, between the ignition switch and starter relay. If you put 12volts on pin 30 you risk frying some circuits on the computer!
Source: by Xris at SuperMotors.net
No Spark Troubleshooting, Overview & Operation; "...Ford calls this electronic ignition the Thick Film Integrated-IV (TFI-IV) ignition system. The TFI module is also known as the Ignition Control Module (ICM) which reports engine position and rpm to the PCM. The PCM then determines the proper spark timing and advance, and returns a reference signal to tell the TFI module to switch the coil, thereby creating a spark. The PCM used on these vehicles is referred to by Ford as the Electronic Engine Control-IV (EEC-IV) module..." most is applicable to Broncos, read more
Source: by therangerstation.com
No Start Troubleshooting, Duraspark
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
No Start; & Relay Connection pic in 92-96; "...The relay trigger wire (LG/R) comes from the ignition switch via the clutch switch or MLPS and should only be hot with the key in START and either the clutch fully depressed, OR the auto shifter in P or N. The solenoid trigger wire goes to the small terminal on the starter. If the relay fails, bridge between the 2 large studs to send power to the solenoid. If the starter still doesn't spin, crawl under the truck, remove the red plastic cover, and BRIEFLY bridge between the 2 large studs on the solenoid (using a heavy metal object with an insulated grip, like a screwdriver) to spin the starter (it won't engage the flywheel or crank the engine). If it still doesn't spin, replace the starter. 130A & heavier alternators use 2 fusible link wires. The Yellow wire goes to the stud on the side of the power distribution box, and feeds all other factory loads on the vehicle..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
OBD II Test Connector Location pic in a 96; Boss Has a cord plugged into it (end rolled up on tranny hum carpet) in this pic; is under of ashtray, to right
Source: by bossind (boss, Steve) at FSB
OBD II Test Connector Location pic in a 96; Boss Has a cord plugged into it (end rolled up on tranny hum carpet) in this pic; is under of ashtray, to right
Source: by bossind (boss, Steve) at SuperMotors.net
Odometer & Keyless Entry Inoperative; Fuse 8 Overload, Possible Short In Circuit 54 TSB 95-14-11 for 94-95 Bronco & F Series; also affected Inoperative Courtesy, Map, Engine & Glove Compartment, Dome, Vanity, & Cargo Lamps & Inoperative Power Mirrors
Source: by Ford via thedieselstop.com
Oil Pressure Gauge & Sender Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Overhead Console & Compass/Outside Temperature Display Module Connector Wiring Diagram in a 96 from 1996 Eddie Bauer Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Overhead Console Wiring Tip in a 96
Source: by Fishallot at FSB
Oxygen (O2) Sensor Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Oxygen (O2) Sensor Wiring Diagram in an 89 5.0, 5.8 & 7.5. Diagram #2
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Oxygen Sensor Wiring Diagram in a 96 5.0 & 5.8 (Fuse shown is maxi fuse #5 in engine compartment Power Distribution Box)
Source: by miesk5 at Ford Bronco Zone Forums
Parking Light Circuit Wiring Diagram & Testing in 92-96; "...The only significant difference between '92-96 and '80-91 is that the MFS's DIMMER switch replaced the older beam select switch, but they perform the same function..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Distribution Box Diagram in a 95
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Power Distribution Box Diagram in a 96
Source: by Roadkill (The Beast) at SuperMotors.net
Power Door Lock Operation & Diagram; "...The door lock circuit is a common (Ford) polarity-reversing circuit with 2 switches. The switches share the power feed from the battery (always hot). The left (driver's) switch normally holds both motor wires to ground, and the right (passenger's) switch normally holds the motor wires to the left switch wires. When either is operated, it sends one of the wires hot, powering the motors. When operated the other way, the polarity is reversed, reversing the motors' direction. Neither switch is a "master" because neither will work if the other is in the opposite position. Note that the driver's lock motor is not connected to the driver's lock switch..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Door Lock Wiring Diagram for 92-96 (First diagram)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Door Lock Wiring Diagram for 92-96 w/Connector Locations (second diagram)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Door Lock Wiring Diagram in 87-89 & F Series
Source: by miesk5 at broncolinks.com/gallery
Power Steering Switch Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Power Window & Door Lock Switch Connector Diagram in a 96 from Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Power Window & Lock Connector Pin-Out Diagram (driver's side) in 92-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Window Operation & Diagram; "...The door window circuit is a common (Ford) polarity-reversing circuit with 1 switch for the left motor & 2 switches for the right. The switches share power feed through the ignition switch (key-on only). On Broncos, this feed is also used for the tailgate window motor's dash switch. For the left window, the left (driver's) switch normally holds both motor wires to ground. When operated, it sends one of the wires hot, powering the motor. When operated the other way, the polarity is reversed, reversing the motor's direction. For the right window, the left (driver's) switch normally holds both motor wires to ground, and the right (passenger's) switch normally holds the motor wires to the dash switch wires. When either is operated, it sends one of the wires hot, powering the motor. When operated the other way, the polarity is reversed, reversing the motor's direction. Neither switch is a "master" because neither will work if the other is in the opposite position.."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Window Wiring Diagram for 84 Bronco & F-Series (partial); "...Similar to 80-91 Bronco & F-Series..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Window Wiring Diagram for 92-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Power Window Wiring Diagram in a 96 from Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Power Window, Power Door Lock, Power Mirror & Speaker Harness & Connector Location & Removal from Door in 92-96; "...The passenger door harness disconnects inside that kick panel. But the driver door harness is continuous from the door lock motor all the way over to those passenger connectors. Either pull the dash, or disconnect everything inside the driver door, and then feed the harness out of it as you remove the door. I'd just unbolt the hinges & hang them both from a beam across the roof of the truck, leaving the wiring connected..."
Source: by Steve83 (Steve, That dirty old truck) at FSB
Power Window, Power Door Lock, Power Mirror & Speaker Harness & Connector Location & Removal from Door in an 88; "...For those pre-92 guys, these are the two connectors behind the kick panel you unplug to remove the door w/o cutting any wires. The upper plug is the power for the windows/locks & the smaller is power for the speaker. On the driver side, the connectors look the same but the green one is gray..."
Source: by Reptillikus ((Project 4D2, Kevin W) at FSB
Programmable Speedometer Odometer Module (PSOM) Wiring Diagram in 96 F Series, 92-95 are Similar
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
PSOM & Keyless Entry Inoperative; Fuse 8 Overload, Possible Short In Circuit 54 TSB 95-14-11 for 94-95 Bronco & F Series; also affected Inoperative Courtesy, Map, Engine & Glove Compartment, Dome, Vanity, & Cargo Lamps & Inoperative Power Mirrors
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
PSOM & Odometer Not Working & E4OD Harsh Shift TSB 94-09-12 for 94 Bronco & F Series; "...PSOM (Programmable Speedometer/Odometer Module) may be inoperative or not function properly and the #8 fuse may be blown. In addition, if the vehicle is equipped with an E4OD transmission, it may exhibit a harsh shift. These conditions may be caused by trim screws installed through the 17K745 visor wire between the left hand "A" pillar and the left hand visor bullet connector..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at fourdoorbronco.com
PSOM & Odometer Not Working & E4OD Harsh Shift TSB 94-09-12 for 94 Bronco & F Series; "...PSOM (Programmable Speedometer/Odometer Module) may be inoperative or not function properly and the #8 fuse may be blown. In addition, if the vehicle is equipped with an E4OD transmission, it may exhibit a harsh shift. These conditions may be caused by trim screws installed through the 17K745 visor wire between the left hand "A" pillar and the left hand visor bullet connector..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
PSOM Wiring Diagram in 96 (similar to 92-95)
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
RABS Inoperative (dash lights on, etc.); E4OD transmission control switch (TCIL) wiring may be misrouted causing a short in the steering column and a blown # 17 fuse for 92-96 in TSB 92-22-5 for 92 Bronco & all Light Trucks
Source: by miesk5 at FSB
RABS Wiring Diagram in a 91
Source: by Ford via Chilton
Radio Color Codes & Connector Pinouts for 87-96
Source: by Ford via miesk5 at Ford Bronco Zone Forums
Radio Wiring Diagram in 87-96; AM Radio, Premium Sound AM/FM Compact Disc Radio, Premium Sound Amplifier; from 1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
Source: by Ford via miesk5 at FSB
Rear Defroster Wiring Diagram in a 96 from Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Rear Defroster Wiring Diagrams for 78-86 & 87-96 Bronco
Source: by Ryan M (Fireguy50) at FSB
Rear View (Electrochromatic) Connector Face Pinout (C913, WPT-584) Diagram in 94-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Relay Overview & Diagrams
Source: by Ryan M (FireGuy50) at fordfuelinjection.com
Relay Test, Ford (Bosch Type); "...Fuel pump relay switches, and other relays are similar to the starter solinoid, in that they make a high amperage connection through a switched low amperage connection. There are two smaller connections, and two larger connections. TO test it, apply 12v to one of the smaller connections, and ground the other smaller connection. (I used to small aligator clipped jumper wries separated by a small piece of cardboard to keep them from shorting against each other.) You should hear it click. Then check for continuity between the two larger connections.Now remove the power from the smaller connections and recheck continuity between the larger connections.With power, one should have continuity, without power it should be an open circuit (no continuity)..."
Source: by Poppy at fordforumsonline.com
Repair Locations Grid & Coding, Bronco; used to pin-point location of a repair or component in a vehicle
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Revised Single Connector Wiper Motor pic & Connector Pin-Out Diagrams in 92-96; "...Two 3-pin connectors were combined into this 5-pin by merging their grounds. A 6-pin connector was also superceded by the 5-pin. Retrofit 5-pin connectors have non-OE colors, so observe pin locations..." See wiring color changes @ pins
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Safety Belt Warning Overview in a 96 from Workshop Manual; "...When the key is turned to RUN or START, power is supplied through Circuit 640 (R/Y) to the warning chime/buzzer module, which then supplies power through Circuit 450 (DG/LG) to illuminate the fasten belts indicator for six seconds, whether or not the driver's safety belt is buckled. The safety belt warning will sound for approximately six seconds unless the driver's safety belt is buckled..."
Source: by Ford via thedieselstop.com
Scan Tool Won’t Initiate Self-Tests (solid tone only); E4OD transmission control switch wiring may be misrouted causing a short in the steering column and a blown # 17 fuse for 92-96 in TSB 92-22-5 for 92 Bronco & all Light Trucks
Source: by miesk5 at FSB
Self Test - & Connector Location pic in 84-86; "...located on R wheelwell near starter relay..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Self Test - & Connector Location pic in a 93; labeled DLC
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Self Test - & Connector Location Video in an 86; "...My Test Connectors and Battery are on the "right side" (passenger) behind a black EGR Vacuum Reservoir..."
Source: by JKossarides ("The Bronco", Jean) at SuperMotors.net
Self Test - & Connectors Pic in an 86; "...My Test Connectors and Battery are on the "right side" (passenger) behind a black EGR Vacuum Reservoir
Source: by JKossarides ("The Bronco", Jean) at SuperMotors.net
Sensor, VSS (also called called RABS), 4WABS & PSOM, PCM Wiring Diagram & Info
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Short Circuits, Common Locations TSB 95-02-11 in 94-95 Bronco & Trucks
Source: by Ford via Chilton
Starter & Battery Parts Break-Out Diagram & Cable Diagram in 92-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Starter & Relay Wiring Diagram in 87-89 & F Series
Source: by miesk5 at broncolinks.com/gallery
Starter & Relay Wiring Diagram in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Starter & Relay Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Starter & Relay Wiring Diagram in an 89
Source: by Cucamongan (Scotty) at SuperMotors.net
Starter Relay Diagram
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Starter Relay Ground Wire Addition & Location Video in an 86
Source: by JKossarides ("The Bronco", Jean) at SuperMotors.net
Starter Relay Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Starter Relay Wiring Diagrams & pic in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Starter Relay Wiring pics in an 80
Source: by REDBEAST9 (The Beast) at SuperMotors.net
Starter Wiring Diagram for 84 Bronco & F-Series (partial); "...Similar to 80-91 Bronco & F-Series..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Starter, Ford PMGR (Permanent Magnet Gear Reduction) Wiring Diagram & Instructions
Source: by Texas Industrial Electric Co. texasindustrialelectric.com
Tachometer Wiring Diagram in a 92
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Tailgate Relay Location in 78-79; "...Behind the guage/speedo is a relay that powers the inside switch, check it..."
Source: by Zebrafive at FSB
Tailgate Relay Location in 78-79; "...ok, for the 78-9 People, for us, it is quite easy, under the dash behind the instrument cluster, there is a relay, that relay is to run the main constant power for the rear window when the key is on..."
Source: by origin at FSB
Tailgate Switch, In-Dash Connector Diagram in a 96 from Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Tailgate Switch, In-Dash pic in a 96 w/Legend
Source: by rdhayward at FSB
Tailgate Window Circuit "... is a common (Ford) polarity-reversing circuit with 2 switches. Each switch has its own power feed; the dash switch through the ignition switch (key-on only) and the tailgate key switch from the battery (always hot). The dash switch normally holds both motor wires to ground, and the key switch normally holds the motor wires to the dash switch wires. When either is operated, it sends one of the wires hot, powering the motor (assuming the latch switch is closed). When operated the other way, the polarity is reversed, reversing the motor's direction. Neither switch is a "master" because neither will work if the other is in the opposite position..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Tailgate Window In-Dash Switch Ground Location in an 86; 701 "...Behind Instrument Panel near RH side of Radio..."
Source: by Ryan M (Fireguy50) at FSB
Tailgate Wiring Diagram (color codes are correct)
Source: by Chris B (Blue, bronco boy) at 3.telus.net
Tailgate Wiring Diagram (color codes are correct)
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Tailgate Wiring Diagram (color codes are correct) - copied from Ryan M (Fireguy50)
Source: by KC200787 at SuperMotors.net
Tailgate Wiring Diagram in 78-79; "One of the most frequently asked tech questions is "Why does my window go down(up) with either the dash(key) switch but will not go up(down) with other one?" The problem is probably in one of the two switches. Notice that both switches are in the circuit in one form or another even if that switch is not being used. Also the 2 wires going between the switches and one of the 2 ground wires coming out of the dash switch are always used." MIESK5 NOTE, The 78-79 TG ckt included a 20 a Circuit Breaker @ starter relay & also receives 12 v from Ignition Switch; whereas later years don't have the CB there; it is of course in the Fuse Panel or have 2 fuses in the panel & under the dash behind the instrument cluster; Also, there is a relay, that relay is to run the main constant power for the rear window when the key is on. by origin at FSB; Behind the guage/speedo is a relay that powers the inside switch, check it by Zebrafive at FSB; NOTE; The safety switch was moved from the tailgate handle to the left latch by 1983 by Seabronc (Rosie, Fred W)
Source: by ORC Staff at ford.off-road.com
Tailgate Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Tailgate Wiring Diagram in 92-96 (color codes are correct)
Source: by Ryan M (Fireguy50) at fordfuelinjection.com
Tailgate Wiring Diagram in 92-96 (color codes are correct) & 78-86 Bronco heated window wiring. (without under hood fuse box)
Source: by Ryan M (Fireguy50) at FSB
Tailgate Wiring Diagram in 92-96 (part of PW Diagram, from Ford EVTM)
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Tailgate Wiring Diagram in an 84; "...Similar to 80-91..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Tailgate Wiring Diagram in an 86 (color codes are correct, from Ford EVTM)
Source: by Chris B (Blue, bronco boy) at sympatico.ca
Tailgate Wiring Diagram, Dash Switch Test, & All TG Connector Locations Diagram in 92-95
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Tailgate Wiring Harness pics; 78-79 (they note that Please note that this is for a 1980-86 Bronco, some connections may be different than original; 80-82 & 83-86 (a product)
Source: by Jeff's Bronco Graveyard
Tailgate Wiring, Grounding & Connector Upgrade Diagrams
Source: by Ryan M (Fireguy50) at FSB
Tailgate, Constant Power for the tailgate window (not a diagram, but gives changes)
Source: by Keith L (TTB Blows, Bling-Bling) via Chris B (Blue, bronco boy) at telus.net
Temperature Sensor Installation, w/Ford Part Number F87Z-12A647-AA & pic from a 99 Explorer in a 95
Source: by Trucky18 (Bco) at FSB
Testing Wiring with a Multi Meter, General; Opens, Short, Voltage & Voltage Drop, Continuity & Diodes
Source: by freeautomechanic.com
Thermactor Air Bypass (TAB) Solenoid Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Thermactor Air Diverter (TAD) Solenoid Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Thick Film Ignition (TFI) Wiring Diagram in a 95; from Ford EVTM
Source: by Ford via Ryan M (Fireguy50) & miesk5 at Ford Bronco Zone Forums
Throttle Position Sensor (TPS) Sensor Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Trailer & Camper Wiring Diagrams for 94 & 96 Trucks
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Trailer Harness Wiring Colors TSB 89-14-17 for 90 Bronco & F Series
Source: by miesk5 at Ford Bronco Zone Forums
Trailer Harness Wiring Kit pic & Info (PN F0TB-15A416-AA); "...The eight wires of the trailer-feed wiring harness, 13A576 (part of trailer towing kit), are ready to be installed to your weatherproof trailer wiring connector. Refer to the identification tag on each wire for the correct electrical function of each circuit..."
Source: by Seattle FSB (SeattleFSB) at FSB
Trailer Harness Wiring Kit pic & Info (PN F0TB-15A416-AA); "...The eight wires of the trailer-feed wiring harness, 13A576 (part of trailer towing kit), are ready to be installed to your weatherproof trailer wiring connector. Refer to the identification tag on each wire for the correct electrical function of each circuit..."
Source: by SeattleFSB (Seattle FSB) at SuperMotors.net
Trailer Light Wiring Diagram in an 86
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Trailer Wiring Kit Installation, 4-wire flat plug, 92-96 Bronco
Source: by hitches4less.com
Transmission Oil Temperature Sensor (TOT) Testing & Connector Pin-Out Diagram
Source: by zoom-tech.com via web.archive.org
Troubleshooting with a Test Light (low resistance); "...low resistance test light can sometimes be used in place of a blown fuse. The light will illuminate while a short circuit to ground exists. DO NOT use a medium or high resistance test light in place of a blown fuse. These types of test lights illuminate with very small amounts of current and can be misleading..." read more
Source: by ocw.weber.edu
Troubleshooting; "If you have a problem when turning on one circuit it causes another to come on partially (dim lights, etc.), check the ground for the part or system that was turned on first. .e., if you press the brake pedal, & the parking lights turn on partially or fully, check the brake lights' ground;This is caused by current going thru da brake light bulb filaments & finding a ground in the parking lt. system instead of its own ground"
Source: by miesk5 at FSB
Turn Signal Switch Connector Location in Parts Break-Out Diagram in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Turn Signal, Back-Up, License, Brake & Dome Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Turn, High & Low Headlight Dimmer, Flash-to-Pass, Hazard, Multi-Function Switch (MFS) & Brake Light Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Turn, High & Low Headlight, Dimmer, Dome, Hazard, etc. Wiring Diagram, Haynes for a 78
Source: by Mike S (Broncster, BRONKSTER) at SuperMotors.net
Turn, Tail, Brake, Head Light, Hazard Wiring Diagram in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Turn, Tail, Brake, Head Light, Hazard, Ignition Wiring Diagram for 84 Bronco & F-Series (partial); "...Similar to 80-91 Bronco & F-Series..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Vehicle Speed Sensor (VSS) Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
VIAIR On Board Air (OBA) Wiring Diagrams
Source: by VIAIR
Voltage Drop Test Video, General
Source: by Federal-Mogul
Warning Chime/Buzzer System; Key-in-Ignition, Fasten Safety Belt & Headlamp-On Warning Wiring Diagram in a 96 from Workshop Manual
Source: by Ford via thedieselstop.com
Window, Rear Defroster Wiring Diagram in an 86
Source: by Chris B (Blue, bronco boy) at 3.telus.net
Window, Rear Defroster Wiring Diagram in an 86 (color codes are correct, from Ford EVTM)
Source: by Chris B (Blue, bronco boy) at sympatico.ca
Windshield Washer Testing in 92-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Windshield Wiper & Washer Pin-Point Testing & Wiring Diagrams in a 96 from 1996 F-150, F-250, F-350, F-Super Duty and Bronco Workshop Manual
Source: by Ford via thedieselstop.com
Windshield Wiper Circuit in Multi-Function Switch (MFS) Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Windshield Wiper Circuit in Multi-Function Switch (MFS) Testing & Wiring Diagram in 92-96; "...the MFS testing is done with connectors disconnected; it's strictly an internal test of the MFS; There is no testing for the WCM - you test the MFS, the wiper & spray motors, and the wiring. If they're good but don't operate, it has to be the WCM by elimination..." Miesk5 NOTE; Brake Light & Turn, High & Low Headlight Dimmer, Flash-to-Pass & Hazard CKTs are a Feed-Through Circuit in Multi-Function Switch (MFS)
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Windshield Wiper Wiring Diagram in an 86
Source: by Xris at SuperMotors.net
Windshield Wiper Wiring Diagram in an 86 & Ford truck
Source: by Agnem (The Moosestang) at webshots.com
Windshield Wiper Wiring Diagram with interval timer in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Windshield Wiper Wiring Diagram without interval timer in an 83
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Wiper Motor & Governor Wiring Diagram in 87-89 & F Series
Source: by miesk5 at broncolinks.com/gallery
Wire Color Code Abbreviation Chart; see post #4; BK Black, BL Blue, BR Brown, DB Dark Blue, DG Dark Green, GN Green, GY Grey, LB Light Blue, LG Light Green, N Natural, O Orange, P Purple, PK Pink, R Red, T Tan, V Violet, W White, Y Yellow
Source: by miesk5 at FSB
Wiring Diagram (Partial) in 92-95 Bronco & F Series
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Wiring Diagram in a 78, Haynes
Source: by Mike S (Broncster, BRONKSTER) at SuperMotors.net
Wiring Diagram in an 86 & Ford truck
Source: by Agnem (The Moosestang) at webshots.com
Wiring Diagrams (Partial, Bronco similar) for F 150 in 86, 89, 91 & 95; EEC, Start/Ignition, EFI/Fuel System, Emissions, E4OD, AOD/C6 (+ clutch interlock switch), MAP, TPS, ECT, ACT, KS) & EGR Valve Position (EVP) from Electrical & Vacuum Troubleshooting Manual (EVTM)
Source: by Ford via Ryan M (Fireguy50) at fordfuelinjection.com
Wiring Diagrams by Auto Repair Reference Center Repair Manual, Mostly Chilton; many local library's offer free online access for their members; just log-in w/your library Card # and password; incl. all Broncos, & many MAKES! 1951 to 2009; some years (85-96, I believe) include: FULL Technical Service Bulletins and Recalls, Labor Hours per repair (plug in appl info); Wiring Diagrams, Vacuum Diagrams (in DRIVEABILITY AND EMISSIONS CONTROLS Section), Specifications (torques, etc.) & Maintenance Intervals
Source: by arrc.epnet.com
Wiring Diagrams in 78 Bronco & 76-78 F Series; Ignition Switch, Distributor, Duraspark, C6 Neutral Safety Switch, Windshield Washer & Washer, Starter & Relay, Battery, Alternator, Horn & Relay, etc.
Source: by Blue79 at photobucket via 7879blueovalbronco.com
Wiring Diagrams in an 86 Ford truck; Many Diesel Engine Systems & Components
Source: by Agnem (The Moosestang) at webshots.com
Wiring Diagrams, How to Read, RealPlayer presentation
Source: by Ford via Dave at hammar.dyndns.org
Wiring Diagrams; click vehicle, year & go to Chassis Electrical & scroll (under license from Delmar Publishers, comb of Chilton/Nichols/Delmar & Haynes); some may be incorrect, as reported by Seabronc, thanks Seabronc! NEW SITE URL!!! MUST REGISTER TO VIEW; select year, make, model, engine size and go to appropriate section
Source: by Chilton via AutoZone
Wiring Harness Conversion for an EFI Swap in an 83 4.9 (also, scroll to many sub-topics on his swap)
Source: by Michael C (collinsperformance, The Money Monster) at SuperMotors.net
Wiring Harness Repairs in a 79
Source: by Kevin M (Project Double Agent) at okcnetworks.com
Wiring Harness, engine compartment, and to rear pics in an 88 C-350 (Centurion Conversions)
Source: by AudraJean (Audra, Audra C, Redçmptiôn, Lochness Monster, Audra D) at SuperMotors.net
Wiring Harnesses & Component Location Diagram, Ford Part Numbers, Depictions, etc. from Ford Workshop Manual in 96 Bronco, F-150, F-250, F-350, F-Super Duty Chassis Cab & Motorhome Chassis; use your Browser's SEARCH (or FIND) function to locate what you seek in each Diagram, such as Air Bag or E4OD, etc.
Source: by Ford via thedieselstop.com
Wiring Layout in 93 Centurion Classic
Source: by Traveler (Centurion) at fourdoorbronco.com