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.
1993 Pontiac LeMans VLFACTORY OEM SERVICE PROCEDURE
ECM Power Circuit
- With ignition off, unplug ECM connectors. With ignition on, check for battery voltage between ECM connector terminal A6 (Red/White/Black wire) and ground.
- If battery voltage does not exist, check fuse No. 10 (20-Amp) in fuse panel. See Fig 1 . If fuse is okay, check for an open in Red/White/Black wire between fuse panel and ECM connector terminal A6. If wire is okay, check for defective ignition switch.
- Check for battery voltage at ECM terminals B1 and C16. If battery voltage does not exist, repair Red/Yellow wire from battery.
Factory Service Tools
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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.
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