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 MANUALSCHEVROLET1989CAPRICE BASE, 4.3 Z, 700R4/MD8REPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSDEFOGGER - REAR WINDOWTESTINGCONTROL TESTCUTLASS CALAIS, GRAND AM & GRAND PRIX
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8
Cutlass Calais, Grand Am & Grand Prix
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8SECTION Cutlass Calais, Grand Am & Grand Prix
- Turn ignition switch to "RUN" position. Connect test light to Pink/Black wire at wiper switch assembly connector. Test light should come on. If not, check Pink/Black wire for open circuit or a faulty "GAUGES" fuse. If okay, proceed to step 2).
- Connect test light to Pink/Black and Black wire at wiper switch assembly. Test light should come on. If not, check Black wire for open circuit. Check and ensure ground is clean and tight. If okay, proceed to step 3).
- Hold rear defogger switch to "ON" position. Connect test light between Light Blue wire and ground. Test light should come on. If not, replace wiper switch assembly.
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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.