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.
Power Modules
The power module contains the circuits necessary to drive the ignition coil, fuel injector and the alternator field. These are high current devices and have been isolated to minimize any electrical noise in the passenger compartment. The power module also houses the automatic shut-down relay (ASD), which activates the fuel pump, ignition coil, injector and portions of the power module.
The ASD relay is inside the power module, but is turned on and off by the logic module. The distributor pick-up signal goes to the logic module only. In the event of no distributor signal the ASD relay is not activated and power is shut off from the fuel and ignition coil. The power module contains a voltage converter which converts battery voltage to a regulated 8-volt output. This voltage output powers the distributor pick-up and also power the logic module.
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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.