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Ford Duraspark II & III Ignition Wiring Diagram - Haynes Ch.5 Page 165
Reference · 1980-1986 BroncoAll 92 wiring diagrams
Engine electrical page showing Duraspark II/III ignition system wiring diagrams with color-coded leads to the ignition module and switch.
Part of 1980-1986 Ford Bronco Wiring Diagrams
This is page 165 from Chapter 5 (Engine electrical systems) of a repair manual, covering Ford Duraspark ignition systems. The text explains that the V6 with EEC uses a modified Duraspark II distributor: centrifugal weights are removed, strong springs hold the sleeve/plate assembly stationary, the diaphragm is replaced by a clip, rotor alignment is not adjustable, and only the cap, rotor and adapter are serviceable, an inoperative distributor housing/stator must be replaced as a unit. The Operation section describes the Duraspark II system's primary circuit (battery, ignition switch, ballast resistor, coil primary winding, ignition module, distributor stator assembly) and secondary circuit (coil secondary winding, rotor, cap, ignition wires, spark plugs). Fig. 5.3 is an exploded pictorial of the Duraspark III ignition system and related parts, labeling the ignition switch (Run/Start), ballast resistor, EEC microprocessor, coil (BAT/TACH terminals), cap, rotor, adapter, starter relay, battery, C.P. sensor, spark plug, and ignition module. Fig. 5.4 is a wiring schematic for the Duraspark II ignition system showing the ignition switch, start bypass around the ballast resistor, ignition coil, distributor stator, ignition system ground, spark plugs, and the ignition module's wire colors: white, red, green, orange, purple, and black. Useful for diagnosing or rewiring a Duraspark ignition system.
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Frequently asked questions
- What components are in the Duraspark II primary ignition circuit?
- The battery, ignition switch, ballast resistor, coil primary winding, ignition module, and distributor stator assembly.
- What makes up the Duraspark II secondary circuit?
- The coil secondary winding, distributor rotor, distributor cap, ignition wires, and spark plugs.
- What wire colors connect to the Duraspark II ignition module in the wiring diagram?
- White, red, green, orange, purple, and black wires are shown at the ignition module connectors in Fig. 5.4.
- Which parts of the Duraspark III (EEC) distributor are serviceable?
- Only the cap, rotor and adapter. Rotor alignment is not adjustable, and if the distributor is inoperative the distributor housing and stator assembly must be replaced as a single unit.
- How is the ballast resistor bypassed during starting?
- Fig. 5.4 shows a 'start bypass' path from the ignition switch's start (S) position that routes power around the ballast resistor to the coil.
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