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.
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HOMESERVICE MANUALSPONTIAC1987FIERO BASE, STANDARD, MG3REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSDOOR LOCKS - AUTOMATICTROUBLE SHOOTINGSYSTEM CHECK
1987 Pontiac Fiero Base, Standard, MG3
System Check
1987 Pontiac Fiero Base, Standard, MG3SECTION System Check
- From inside of vehicle, close all doors. Turn ignition switch to "RUN" position and place gear selector in "DRIVE". All doors should lock.
- Place gear selector in "PARK". All doors should unlock. If any door does not lock, check digital cluster fuses 5, 15 and 19, indicator and gage cluster fuse 16 and circuit breaker 24.
- If locks do not lock, ensure that ignition switch is at "RUN" position, all doors are closed and gear selector is not in "PARK". If locks do not unlock, ensure that ignition switch is at "RUN" position and gear selector is in "PARK".
NOTE:
Before testing automatic door locks, ensure that the power door locks are operating properly. Repair as necessary. See GENERAL MOTORS POWER DOOR LOCKS article in this section.
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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.