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Brake Warning Indicator Always On

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn the ignition on. Ensure that the parking brake is disengaged. With the DRBIII in inputs/outputs, read the parking brake switch state. If the DRBIII displays CLOSED with the parking brake disengaged, go to the next step. If the DRBIII does not display CLOSED with the parking brake disengaged, go to step  4 .
  2. Turn the ignition off. Disconnect the park brake switch harness connector. Turn the ignition on. With the DRBIII in Inputs/Outputs, read the parking brake switch state. If the DRBIII displays OPEN, replace the park brake switch. If the DRBIII does not display OPEN, go to the next step.
  3. Turn the ignition off. Disconnect the park brake switch harness connector. Disconnect the instrument cluster harness connector. Measure the resistance between ground and the brake warning indicator driver circuit. If the resistance is less than 10,000 ohms (should be infinite) repair the brake warning indicator circuit for a short to ground between the park brake switch and the instrument cluster. If the resistance is more than 10,000 ohms (should be infinite) replace the instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article.
  4. Ensure that the brake fluid is properly filled to the correct level, and the base brake system operates properly. Turn the ignition on. With the DRBIII in Inputs/Outputs, read the brake fluid level switch state. Disconnect the brake fluid level switch harness connector. With the DRBIII in Inputs/Outputs, read the brake fluid level switch state. If the DRBIII brake fluid level switch input changed states, replace the brake fluid level switch. If the DRBIII brake fluid level switch input did not change states, go to the next step.
  5. Turn the ignition off. Disconnect the brake fluid level switch harness connector. Disconnect the PCM (C2 connector) harness connector. Measure the resistance between ground and the Red brake warning indicator driver circuit. If the resistance is less than 10,000 ohms (should be infinite) repair the Red brake warning indicator driver circuit for a short to ground between the brake fluid level switch and the instrument cluster. If the resistance is more than 10,000 ohms (should be infinite), the test is complete.
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