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Brake Indicator Always On

Possible Causes:

Testing

    NOTE: Ensure that the Brake Fluid Level is properly filled and the Brake Fluid Level Switch harness connector is properly connected.
  1. With the DRBIII(R), erase DTCs. Cycle the ignition and wait approximately 15 seconds. With the DRBIII(R), read DTCs. Does the DRBIII(R) display BRAKE FLUID LEVEL SWITCH CIRCUIT OPEN? If yes, see BRAKE FLUID SWITCH CIRCUIT OPEN  . If no, go to next step.
  2. Turn the ignition off. Disconnect the Brake Fluid Level Switch harness connector. Measure the resistance of the Brake Fluid Level Switch. Is the resistance below 900 ohms? If yes, replace the Brake Fluid Level Switch in accordance with the Service Information. Perform BODY VERIFICATION TEST  . If no, go to next step.
  3. Turn the ignition off. Disconnect the Brake Fluid Level Switch harness connector. Disconnect the Instrument Cluster harness connector. Measure the resistance between ground and the Red Brake Warning Indicator Driver circuit. Is the resistance below 5.0 ohms? If yes, repair the Red Brake Warning Indicator Driver circuit for a short to ground. Perform BODY VERIFICATION TEST  . If no, go to next step.
    4. NOTE: Ensure that the Brake Fluid Level Switch and Instrument Cluster harness connectors are properly connected.
  4. Disconnect the Park Brake Switch harness connector. With the DRBIII(R) in Inputs/Outputs, read the Park Brake Switch state. Does the DRBIII(R) display Open? If yes, replace the Park Brake Switch. Perform BODY VERIFICATION TEST  . If no, go to next step.
  5. Turn the ignition off. Disconnect the Park Brake Switch harness connector. Disconnect the Instrument Cluster harness connector. Measure the resistance between ground and the Park Brake Switch Sense circuit. Is the resistance below 5.0 ohms? If yes, repair the Park Brake Switch Sense circuit for a short to ground. Perform BODY VERIFICATION TEST  . If no, replace the Instrument Cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS - LIBERTY article. Perform BODY VERIFICATION TEST  .
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