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 . The Red and White wires are the ignition feed wires. The White wire is for cranking, and the Red wire is for operation after the engine is running.
The Red wire circuit contains a 1.1 ohm resistance wire. The current to the primary circuit of the ignition coil is turned off and on through the Green wire.
The Orange and Purple wires transmit signals to the electronic control module from the reluctor (armature) and pick-up coil (stator) in the distributor.
The Black wire is used to ground the electronic control module through the distributor housing.
Electronic control modules of the UIM type, having the third connector, provide for additional spark timing control. This connector receives a signal from the Ignition Barometric Switch, Ignition Timing Vacuum Switch, or the MCU module depending on engine calibration.
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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.