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Brake Warning Indicator Always On

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.
  1. Ensure that parking brake is off and brake fluid is at proper level. Go to next step.
  2. Using scan tool, display IPC DATA LIST. Monitor BRAKE LAMP INPUT. Turn ignition on. If scan tool does not indicate BRAKE LAMP INPUT OFF, go to next step. If scan tool indicates BRAKE LAMP INPUT OFF, go to step  11 .
  3. Monitor BRAKE FLUID LEVEL on scan tool. If scan tool indicates BRAKE FLUID LEVEL OK, go to next step. If scan tool does not indicate BRAKE FLUID LEVEL OK, go to step  5 .
  4. Monitor PARK BRAKE SWITCH on scan tool. If scan tool does not indicate PARK BRAKE SWITCH INACTIVE, go to step  8 . If scan tool indicates PARK BRAKE SWITCH INACTIVE, go to step  11 .
  5. Disconnect brake fluid level switch connector located on bottom of brake fluid reservoir. If scan tool indicates BRAKE FLUID LEVEL OK, go to next step. If scan tool does not indicate BRAKE FLUID LEVEL OK, go to step  7 .
  6. Replace brake fluid level switch. After repairs, go to step  12 .
  7. Repair short to ground in Purple wire between instrument cluster connector terminal B4 and brake fluid level switch. See Fig 1 . After repairs, go to step  12 .
  8. Remove instrument panel trim plate and parking brake boot. See CENTER CONSOLE  under REMOVAL & INSTALLATION. Disconnect parking brake switch connector. If scan tool indicates PARKING BRAKE SWITCH INACTIVE, go to next step. If scan tool does not indicate PARKING BRAKE SWITCH INACTIVE, go to step  10 .
  9. Replace parking brake switch. After repairs, go to step  12 .
  10. Repair short to ground in Tan/White wire between instrument panel connector terminal A6 and parking brake switch. After repairs, go to step  12 .
  11. Replace IPC. See INSTRUMENT PANEL CLUSTER (IPC)  under REMOVAL & INSTALLATION. After repairs, go to next step.
  12. Recheck system operation. If symptom still exists, return to step  1 .
Fig 1: Identifying Instrument Cluster Connector Terminals
G00011672Courtesy of GENERAL MOTORS CORP.
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