Pinpoint Test A: Red Brake Warning Indicator Always On
- A1 CHECK PARKING BRAKE SWITCH NOTE: Prior to troubleshooting the vehicle for this concern, verify that the rubber bumper on the parking brake pedal arm contacts the parking brake switch when the pedal is in the fully released position.
- Key in ON position.
- Disconnect: Parking Brake Switch C2015.
- Does the red brake warning light go out?
- Yes : INSTALL a new parking brake switch. TEST the system for normal operation.
- No :GO to A2.
- A2 CHECK BRAKE FLUID LEVEL SWITCH
- Disconnect: Brake Fluid Level Switch C124.
- Connect a fused jumper wire between brake fluid level switch C124 pin 2, circuit 512 (TN/LG) and pin 3, circuit 531 (DG/YE), harness side.
- Does the red brake warning light go out?
- Yes : INSTALL a new brake master cylinder reservoir. TEST the system for normal operation.
- No :GO to A3.
- A3 CHECK CIRCUIT 512 (TN/LG) FOR SHORT TO GROUND
- Measure the resistance between brake fluid level switch C124 pin 2, circuit 512 (TN/LG) harness side and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to A4.
- No :REPAIR the circuit. TEST the system for normal operation.
- A4 CHECK CIRCUIT 531 (DG/YE) FOR SHORT TO GROUND
- Measure the resistance between brake fluid level switch C124 pin 3, circuit 531 (DG/YE) harness side and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to A5.
- No :REPAIR the circuit. TEST the system for normal operation.
- A5 CHECK THE INSTRUMENT CLUSTER
- Disconnect: Instrument Cluster C220b.
- Does the brake warning light go out?
- Yes : GO to A4.
- No :REPAIR or INSTALL a new instrument cluster. TEST the system for normal operation.