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 MANUALSPONTIAC1991GRAND PRIX STE, 3.4 X, STANDARDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSDEFOGGER - REAR WINDOWON-VEHICLE SERVICINGGRID LINE REPAIR
1991 Pontiac Grand Prix STE, 3.4 X, Standard
Grid Line Repair
1991 Pontiac Grand Prix STE, 3.4 X, StandardSECTION Grid Line Repair
NOTE:
A conductive paint should be used to repair grid lines.
- Clean area to be repaired with window cleaner. Wipe repair area with clean dry cloth to remove any lint. Mask repair area so conductive paint can be overlapped onto broken grid line or bus bar. Put masking tape along both sides of grid line.
- Apply conductive paint to repair area 3 times in 15-minute intervals, overlapping onto existing grid line by approximately 3/4".
- Carefully remove masking tape from repair area. Allow conductive paint to cure for 24 hours at room temperature or use heat gun with heat range of 500-700°F (260-371°C) for 15 minutes.CAUTION: DO NOT allow glass surface to exceed 400°F (204°C), or glass may fracture.
- Hold heat gun approximately 10" from repair area. After repair compound has properly cured, check operation of rear defogger.
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.