Test A: Brake Warning Indicator Always On
- Turn ignition switch to OFF position. Disconnect brake fluid level indicator sensor. Turn ignition switch to RUN position. If BRAKE warning indicator illuminates, go to step 3 . If BRAKE warning indicator does not illuminate, go to next step.
- Replace brake fluid level indicator sensor. Recheck system operation.
- Turn ignition switch to OFF position. Disconnect parking brake indicator switch connector. Turn ignition switch to RUN position. If BRAKE warning indicator illuminates, go to step 5 . If BRAKE warning indicator does not illuminate, go to next step.
- Replace parking brake indicator switch. Recheck system operation.
- Turn ignition switch to OFF position. Disconnect Daytime Running Lights (DRL) control module Blue 8-pin connector C2. Turn ignition switch to RUN position. If BRAKE warning indicator illuminates, go to step 7 . If BRAKE warning indicator does not illuminate, go to next step.
- Check for short to ground in Light Blue wire between DRL control module and parking brake indicator switch. Repair as necessary and recheck system operation. If circuit is okay, replace Daytime Running Lights (DRL) control module. Recheck system operation.
- Check for short to ground in Tan/White wire between DRL module and instrument cluster connector C2. Repair as necessary and recheck system operation. See WIRING DIAGRAMS . If circuit is okay, replace instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Contact an authorized A/C Delco service center for transfer of information from failed Instrument Panel Cluster (IPC) or affix appropriate label with necessary vehicle information on driver door pillar. Recheck system operation.