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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 17 (BODY CONTROL MODULES)DIAGNOSTIC TESTSDTC B0432: REAR DEFOGGER RELAY CIRCUIT (OPEN OR SHORT TO GROUND)TESTING
2001 Chevrolet Cavalier LS, 2.4 T
DTC B0432: Rear Defogger Relay Circuit (Open Or Short To Ground): Testing
2001 Chevrolet Cavalier LS, 2.4 TSECTION Testing
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- If BCM diagnostic system check has been performed, go to next step. If BCM diagnostic system check has not been performed, go to BODY CONTROL MODULE DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
- Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, command rear defogger relay on and off. If rear defogger relay does not turn on and off with commands, go to next step. If rear defogger relay turns on and off with commands, go to DIAGNOSTIC AIDS .
- Turn ignition off. Remove rear defogger relay from instrument panel electrical center. See Figure. Turn ignition on. Using a test light connected to ground, probe rear defogger relay IGN terminal at instrument panel electrical center. If test light comes on, go to next step. If test light does not come on, go to step 10.
- Connect test light between rear defogger relay IGN and CK193 terminals at instrument panel electrical center. Using scan tool, command rear defogger relay on and off. If test light does not turn on and off as commanded, go to next step. If test light turns on and off as commanded, go to step 8.
- If test light does not remain on with each command, go to next step. If test light remains on with each command, go to step 7.
- Check for an open in White wire between BCM connector C2 and rear defogger relay. See WIRING DIAGRAMS . If circuit is okay, go to step 9. If faulty circuit is found and repaired, go to step 13.
- Check for short to ground in White wire between BCM connector C2 and rear defogger relay. If circuit is okay, go to step 9. If faulty circuit is found and repaired, go to step 13.
- Check for poor connections at rear defogger relay terminals. If connections are okay, go to step 11. If problem is found and repaired, go to step 13.
- Check for poor connections at BCM connector terminals. If connections are okay, go to step 12. If problem is found and repaired, go to step 13.
- Repair open or short in ignition feed circuit to instrument panel electrical center. See POWER DISTRIBUTION article in WIRING DIAGRAMS. After repairs, go to step 13.
- Replace rear defogger relay. After repairs, go to step 13.
- Replace BCM and program. See BODY CONTROL MODULE (BCM) under REMOVAL & INSTALLATION. See BCM PROGRAMMING/RPO CONFIGURATION under PROGRAMMING. After repairs, go to next step.
- Turn ignition off. Reinstall all components and connectors. Turn ignition on. Clear DTCs. If DTC resets, go to step 2.
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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.