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FORD BRONCO -> IGNITION; plugs/wires, distributors, MSD, firing orders; switch & ignition actuator rod, TSBs... -> System; Davis Unified Ignition (DUI), Duraspark, Thick Film Ignition (TFI), MSD, Jacobs, Crane, PerTronix -> Duraspark
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1, 2 & 3 Overview & Schematics "In 1974, Ford/Mercury began to use breakerless ignition systems. The first of these electronic ignition systems was originally just referred to as the breakerless ignition system, but later, in 1977, it became known as Duraspark. The Duraspark I system, and the next version, Duraspark II were nearly identical in operation, and virtually identical in appearance. All Duraspark II systems are easily identified by having a two-piece, flat topped distributor cap. Duraspark I was discontinued after the 1981 model year In 1980, the new Duraspark III system was introduced..." (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
Conversion to Durapark 2
Source: by
Conversion, 3 to 2 in an 83
Source: by Michael C (collinsperformance, The Money Monster) at
Conversion, 3 to 2 in an 83 (pic Links here are dead; see his SuperMotors site for the pics
Source: by Michael C (collinsperformance, The Money Monster) at FSB
Description & pics, prior to 85 (usually on driver's side fender well under the hood)
Source: by
Diagram, Durapark 3
Source: by Vincent C at
Duraspark 2 Troubleshooting
Source: by
Duraspark 2 Troubleshooting
Source: by
Duraspark 2 Wiring Diagram for 70s Ford
Source: by Brent W at
Ignition Module 4 Pin Socket Pigtail Wiring Info &pic in an 84; "...if you can go 12AWG instead of 10AWG it will be a lot easier. The 10AWG is a real tight fit and will tear the boot off if you don't ease it in with a small flathead. The 12AWg should fit fine..." READ MORE
Source: by 84broncoAZ at FSB
Location Diagram (part of EEC III Testing, Pin-Out, Wiring & Vacuum Diagrams) in an 82; "...Woe was me, when I found out my 82 Ford Bronco was an EEC 3; had searched all over the engine compartment for the infamous "self test connector", only to find NONE..."
Source: by Tommy at
No Spark Troubleshooting, General; "...Secondary ignition voltage can shock you. Do NOT hold or touch a spark plug wire while cranking the engine. disconnect one of the plug wires from a spark plug and place the end of the wire near a metal surface on the engine. You can insert a small Phillips screwdriver into the end of the wire (the plug boot), or a small bolt or nail to provide a conductive path. Then crank the engine and look for a spark to jump from the screwdriver, bolt or nail in the end of the plug wire to the engine. If you do not see a spark, there is an ignition problem..."
Source: by
No Start Troubleshooting
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Overview & Diagram, Durapark 3
Source: by Automotive Questions and Answers
Overview Diagram in a 78 w/Nomenclature
Source: by Indybronco (Lula Mae) at
Overview, Wiring Diagram, Conversions, Durapark 2; "...Duraspark II electronic ignition was used on 1977 to 1984 Ford V-8 passenger car and light truck engines. This article refers to the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector. Another version of the system has an additional 3-pin wiring connector, and two YELLOW strain relief bushings..."
Source: by The Ford V-8 Engine Workshop
Overview, Wiring Diagrams, etc., Durapark 2
Source: by Sandy at webpages.charter
Parts Break-Out Diagram in a 78 w/Nomenclature
Source: by Indybronco (Lula Mae) at
Test Using Actron Ignition Module & Engine Sensor Tester
Source: by
Testing Story in an 80 F 150; "...a Parts House Adventure..."
Source: by Richard M at
Timing, Durapark 3
Source: by horsepuller at fte
Wiring Diagram for 302 & 351 W, Durapark 2
Source: by
Wiring Diagram for 70s Ford, Durapark 2
Source: by Bill W at
Wiring Diagram for 84 Bronco & F-Series (partial); "...Similar to 80-91 Bronco & F-Series..."
Source: by Steve83 (Steve, That dirty old truck) at
Wiring Diagram in 78 Bronco & 76-78 F Series
Source: by Blue79 at
Wiring Diagram in a 79
Source: by Chilton
Wiring Diagram in an 81 F 150
Source: by Chilton via miesk5 at FSB
Wiring Diagram in an 83 see #3
Source: by Seabronc (Rosie, Fred W) at Ford Bronco Zone Forums
Wiring Diagram in an 84
Source: by
Wiring Diagram in an 86 & Ford truck
Source: by Agnem (The Moosestang) at
Wiring Diagram, Haynes for a 78
Source: by Mike S (Broncster, BRONKSTER) at
Wiring Diagram, using Magnetic Pickup Trigger
Source: by Bill A (BillaVista) at