Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Electronic Control Module
Each Dura-Spark II module has 6 wires (a 2-wire and a 4-wire connector). See Figure and Figure. Dura-Spark systems with UIM modules have an additional 3-wires leading to one 3-wire connector. The Red and White wires are ignition feed wires (the White wire is for cranking and Red wire is for operation after the engine is running). The Red wire circuit contains a 1.1 ohm resistance wire.
Current to the ignition coil primary circuit is turned on and off through the Green wire. The Orange and Purple wires transmit signals to electronic control module from reluctor (armature), and pick-up coil (stator) in distributor.
The Black wire is used to ground electronic control module through the distributor housing. On models with UIM module, additional 3 wires connect to either a vacuum modulator valve or a barometric pressure switch.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.