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 MANUALSCHEVROLET1986CAMARO BASE, 2.8 S, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSDEFOGGER - REAR WINDOWTESTINGSWITCH TESTCALAIS & GRAND AM
1986 Chevrolet Camaro Base, 2.8 S, Standard
Calais & Grand Am
1986 Chevrolet Camaro Base, 2.8 S, StandardSECTION Calais & Grand Am
- Turn control switch on, check that indicator lamp comes on and check that grid gets hot. Wait 10 minutes, indicator lamp should go off. Turn control switch on again, check that indicator lamp goes off after 5 minutes.
- Turn control switch on once more, check that indicator lamp comes on and immediately turn switch off. Check that indicator lamp goes off and that grid cools down.
- Check "ACC" circuit breaker by operating power door locks. Check gauge fuse by watching instrument panel warning lights. If problem involves time that defogger operates, replace control switch.
- Remove connector from control switch and defogger timer/relay. Check LT BLU, ORG/BLK and PNK/BLK wire terminals for battery voltage. If voltage is incorrect, check circuit for that terminal.
- If voltage is correct, disconnect negative battery cable and measure BLK and BLK/WHT wire resistance to ground. Resistance reading must be 1 ohm or less for BLK wire, 2 ohms or less for BLK/WHT wire. If resistance is incorrect, check defogger grid. If voltage and resistance are correct, replace control switch.
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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.