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FORD BRONCO -> CLIMATE CONTROL; heater, AC, blower motor/resistor -> Blower Motor & Resistor
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This is a Ford Bronco, Truck & Van Technical & Parts LINKS site developed by the MIESK5 Family & is not affiliated with the Ford Motor Co. in any manner.
Although we initially developed this site for 78-96 Big Broncos, information in many Links also applies to F, E Series & Cars
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Blower Ice TSB 95-07-16 for 95 Bronco & F Series
Resistor
Wind Noise Coming From Plenum Area When Blower Is On TSB 94-23-14 for 94 Bronco, F Series & F47
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Blower Ice TSB 95-07-16 for 95 Bronco & F Series; "...ISSUE: The A/C heater blower wheel may fracture on some vehicles due to ice formation in the blower housing. This may be caused by water traveling between the hood and cowl area and then entering the evaporator case through a gap in the case halves. This water then collects in the blower wheel housing and freezes causing the blower wheel to separate when the blower motor is turned on. ACTION: When servicing a blower wheel for this concern, it is necessary to seal the evaporator case seam with rope sealer obtained locally. Refer to Figure 1 for the correct location to install the rope sealer..."
Source: by Ford via thedieselstop.com
Climate Control System Wiring Diagrams in a 96; Heater, A/C & Heater Blower Motor Connector, Blower Motor Switch Resistor Connector, A/C-Heater Control Assembly Connector, A/C Cycling Switch Connector, A/C Pressure Cut-Off Switch Connector Pin-Out Diagrams from 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual
Source: by Ford via thedieselstop.com
Connector Location in Engine Bay Diagram in a 90 4.9L Page 1
Source: by Seattle FSB (SeattleFSB) at SuperMotors.net
Connector Location in Engine Bay Diagram in a 90 5.0 & 5.8 Page 2
Source: by Seattle FSB (SeattleFSB) at SuperMotors.net
Control Assembly Connector Location, Behind Instrument Panel Diagram in a 96, Page 2
Source: by Ford via Chilton
Control Assembly Illumination Connector Location Behind Dash in a 90
Source: by Seattle FSB (SeattleFSB) at SuperMotors.net
Control Panel Diagrams & Overview in 92-96
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Controls Overview in an 83 from Owner's Manual
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Controls Overview in an 86 from Owner's Manual
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
Engine Coolant Concerns TSB 93-24-08 for 84-94 Bronco, F Series, Aerostar, Econoline & many others; See table to check for proper blower operation; "...ISSUE: Engine performance concerns such as hesitation or stall, rough idle, and/or poor fuel economy may be caused by the thermostat stuck in an open position or opening at a temperature lower than specified. ACTION: Use the following "Cooling System Diagnosis" procedure to diagnose a cooling system that may not be reaching normal operating temperature. Follow the "Thermostat Diagnosis" procedure to determine if the thermostat may be at fault. Check the thermostat without removing it from the vehicle by using Rotunda Service Coolant Temperature Monitor Harness 007-00064. DIAGNOSIS PROCEDURE; A new cooling system diagnosis procedure has been developed for engines that do not reach normal operating temperature. A new thermostat diagnosis procedure also has been developed, using a new service coolant temperature monitor harness. See chart for proper diagnostic procedure. NOTE: THIS PROCEDURE WILL DIAGNOSE ONLY COOLING SYSTEMS THAT MAY NOT BE REACHING NORMAL OPERATING TEMPERATURE. IT WILL NOT DIAGNOSE A THERMOSTAT THAT CAUSES AN ENGINE OVERHEAT CONDITION. THERMOSTAT DIAGNOSIS; NOTE: DISCONNECTING THE POWERTRAIN CONTROL MODULE (PCM) TO ATTACH A BREAKOUT BOX OR AN EEC IV MONITOR WILL ERASE THE ADAPTIVE LEARNING FROM MEMORY AND MAY "HIDE" A DRIVE CONCERN TEMPORARILY UNTIL THE ADAPTIVE LEARNING IS RE-LEARNED. NOTE: THIS PROCEDURE IS MOST ACCURATE IF PERFORMED INDOORS AT LESS THAN 100°F (38°C) AMBIENT TEMPERATURE. THIS TEST MAY BE PERFORMED WITH OR WITHOUT THE HOOD OPEN AND WITH THE ENGINE WARM OR COLD. CAUTION: ALWAYS VENT THE EXHAUST TO THE OUTSIDE WHEN PERFORMING THIS TEST. 1. Check the coolant level in the radiator and coolant recovery reservoir. 2. With the key in the "off" position, proceed as follows: a. Remove the engine coolant temperature (ECT) sensor harness connector. b. Attach Rotunda Service Coolant Temperature Monitor Harness 007-00064 as a jumper between the PCM and the ECT. c. Attach Rotunda 73 Digital Multimeter 105-00051 or equivalent to the thermostat monitor harness. Voltage values (0-5vdc) may now be monitored while the sensor retains its connection to the wiring harness. NOTE: A ROTUNDA NEW GENERATION STAR TESTER (NGS) 007-00500 OR THE ROTUNDA SERVICE BAY DIAGNOSTIC SYSTEM (SBDS) 001-00001 MAY BE USED TO MONITOR THE ECT ON VEHICLES EQUIPPED WITH DATA COMMUNICATIONS LINK (DCL). THE SBDS SEQUENCE TO USE FOR THE SCREEN IS "TOOLBOX - ELECTRONIC ENGINE CONTROL AND DCL - ITEM". 3. Vehicles equipped with electric engine cooling fan(s) must have a fan running during this test (high or low speed may be used). Two methods may be used to turn the fan(s) on: a. Disconnect the A/C compressor clutch power supply and turn the climate control to A/C "ON". Or b. Disconnect the power supply to the cooling fan and supply 12 volts direct to the fan connector from the battery. NOTE: A GROUND MAY BE REQUIRED FOR SOME APPLICATIONS. 4. Place transmission in "park" or "neutral". NOTE: RUNNING THIS TEST WITH THE VEHICLE IN GEAR OR WITH THE A/C COMPRESSOR CLUTCH ENGAGED (RUNNING) WILL CAUSE IMPROPER DIAGNOSIS 5. Start the engine and allow to idle throughout this test: a. Allow engine to run for 2 minutes, then record ECT voltage. b. From now on, record ECT voltage every 60 seconds. c. When the ECT voltage trend changes direction or changes only slightly (0.03 volts or less) from the previous reading, record this as the thermostat opening voltage. d. Use the "Voltage and Corresponding Temperature Chart" shown below to obtain actual coolant temperatures. 6. If the opening voltage is GREATER than 0.75 volts (less than 180° F/ 82° C), or 0.85 volts (170° F/ 77° C) for 2.3L HSC engine only, replace the thermostat. Refer to the dealer Master Parts Catalog for correct thermostat usage. 7. If the thermostat opening voltage is LESS than 0.75 volts (greater than 180° F/ 82° C), or 0.85 volts (170° F/ 77° C) for 2.3L HSC engine only, the thermostat is good and should NOT be replaced. The "Cooling System Diagnosis Chart" should be referenced for further instructions. NOTE: The 10° F opening temperature difference for the 2.3L HSC engine is due to the ECT sensor location. OTHER APPLICABLE ARTICLES: NONE SUPERSEDES: 93-14-04 WARRANTY STATUS: INFORMATION ONLY..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Heater Core & Motor Replacement in 78-79 & 73-79 F Series
Source: by Ford via Broncobill78 (Dave) at Ford Bronco Zone Forums
Leaf & Debris Build-Up Location in 80-96 Blower Motors/Ducts; Resistor shown in Red - some pics are gone
Source: by STUPID at FSB
Leaf & Debris Build-Up Location pic in 80-96 Blower Motors & Ducts
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Leaf & Debris Build-Up, Drain Location pics in a 90
Source: by My90Bronco (James, Switch) at SuperMotors.net
Motor & Wheel Removal & Installation in a 96; from 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual; "...Removal: Disconnect battery ground cable(s). On California vehicles, remove emission module forward of blower motor (18527). Disconnect wire harness connector from blower motor by pushing down on connector tabs and pulling connector off blower motor. Disconnect blower motor housing tube (19A786) at blower motor. Remove four screws attaching blower motor to heater plenum chamber case (18A484). Holding blower motor housing tube, pull blower motor from heater plenum chamber case and remove it from vehicle. If the blower motor wheel (18504) is to be installed on the new blower motor, remove the retainer and then gently pull the blower motor wheel from the shaft. Installation: NOTE: When the battery (10655) has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module (PCM) (12A650) relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy. Follow removal procedures in reverse order..."
Source: by Ford via thedieselstop.com
Motor Current Draw and Voltages in a 96 Bronco, from Workshop Manual; Low 3-5 / 3-4 volts; Medium Low 6-8 / 5-7 volts; High 15-22 / 11-14 volts;Blower Circuit System Protection 30 Amp Mini-Fuse (Light Green) in Panel F-14 (D9ZB-14A094-GA)
Source: by Ford via miesk5 at Ford Bronco Zone Forums
Motor Pic in 96 Bronco. Fits all '92-96 F-Series & Bronco
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Motor Replacement in 73-79 F Series & 78-79 Bronco with Factory A/C or Hi/Low Heaters
Source: by Trent (Picador, a Four Door 79, InfoFord) at ncspecialties.com
Operation, Troubleshooting & Wiring Diagram in an 86; pages 140-145, from Electrical and Vacuum Troubleshooting Manual (EVTM) (Partial)
Source: by Chris B (Blue, bronco boy) at telus.net
Repair Price Estimator, Bronco from 90-96 and other Fords; including labor & parts, shops in area, by Zip Code
Source: by RepairPal
Switch Connector Pin-Outs and Testing in an 96
Source: by Ford via thedieselstop.com & miesk5 at FSB
Switch Connector, Behind Instument Panel Location Diagram in an 83 from EVTM Behind Instument Panel Location Diagram in an 83 from EVTM
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Switch Location Diagram in a 78
Source: by Indybronco (Lula Mae) at SuperMotors.net
Symbols in Wiring Diagrams
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Testing Wiring with a Multi Meter, General; Opens, Short, Voltage & Voltage Drop, Continuity & Diodes
Source: by freeautomechanic.com
Wind Noise Coming from Plenum Area When Blower is On TSB 94-23-14 for 94 Bronco, F Series & F47; "...Some vehicles may experience a “whistling” noise coming from the plenum area. This noise may be most noticeable when the blower motor is on the blower speed on “HI” or “MED-HI” positions. Five locations have been identified as likely areas where noise conditions may develop. They are as follows:• The bottom heater core cover locating pins. Tooling hole region. Inboard upper stud region. The region above the temperature door at the pivot, inside the plenum. Heater core cover outer diameter, most likely the bottom, right side, middle and left side middle..." Read More
Source: by Ford via thedieselstop.com
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 in 78 Bronco & 76-78 F Series
Source: by Blue79 at photobucket.com
Wiring Diagram in 87-89 Bronco & F series (Mitchell)
Source: by equivalent (Beetlejuice) at SuperMotors.net
Wiring Diagram in a 78
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Wiring Diagram in a 79 w/AC
Source: by Ranger429 (Trailer Special) at SuperMotors.net
Wiring Diagram in a 96 from 1996 F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual; Blower Motor Control - Three of four operating speeds (LOW, MEDIUM LOW and MEDIUM HIGH) are controlled by a heater blower motor switch resistor connected in series with three of the operating positions and the ground. The MEDIUM LOW and MEDIUM HIGH positions on the heater control are identified by dots on the control. With the heater blower motor switch in its LOW position, current flow in the ground circuit passes through three of the coils in the heater blower motor switch resistor. In MEDIUM LOW, current flows through two coils. In MEDIUM HIGH, current flows through one coil. In HIGH, current flow in the motor ground circuit bypasses the heater blower motor switch resistor to provide maximum speed.
Source: by Ford via thedieselstop.com & miesk5 at FSB
Wiring Diagram in a 96 from F-150, F-250, F-350, F-Super Duty and Bronco, F-Super Duty Motorhome Chassis Workshop Manual
Source: by Ford via thedieselstop.com
Wiring Diagram in an 81 F 150
Source: by Chilton via miesk5 at FSB
Wiring Diagram in an 84 (diagram #3)
Source: by toddcomputer.com
Wiring Diagram in an 84 Bronco & F-Series (partial); "...Similar to 80-91 Bronco & F-Series..."
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net
Wiring Diagram in an 86 & Ford truck
Source: by Agnem (The Moosestang) at webshots.com
Wiring Diagram, Haynes for a 78
Source: by Mike S (Broncster, BRONKSTER) at SuperMotors.net
Wiring Harness & 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 blower
Source: by Ford via thedieselstop.com