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 MANUALSPONTIAC1983FIREBIRD BASE, 2.8 1, AUTOMATIC, 200C/MV9REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSDOOR LOCKS - POWERTESTING - RELAY SYSTEMSDOORS UNLOCK BUT WILL NOT LOCK
1983 Pontiac Firebird Base, 2.8 1, Automatic, 200C/MV9
Doors Unlock But Will Not Lock
1983 Pontiac Firebird Base, 2.8 1, Automatic, 200C/MV9SECTION Doors Unlock But Will Not Lock
Check for power at Tan wire on relay with switch in lock position. If no power, check for open in Blue wire between relay and body harness. If power is present, replace relay.
RENDER: 1.0x
NO RELATED
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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.