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 Buick Roadmaster BaseFACTORY OEM SERVICE PROCEDURE
Test Description
- Isolates a power door lock system fault or keyless entry system fault.
- Isolates a keyless entry system functional failure.
- If courtesy light function operates normally, circuit No. 156 to keyless entry receiver and connection at receiver are good.
- Checks for unwanted voltage at terminal "C" of keyless entry receiver Blue connector when transmission is in Drive.
- Checks for voltage input at terminal "C" of keyless entry receiver Blue connector when transmission is in Park.
Factory Service Tools
Use the Manual With the Right Hardware
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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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