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Brake Warning Indicator Inoperative

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
    NOTE: The brake warning indicator should illuminate during the bulb check cycle, and will also illuminate using the self test.
  1. Observe the brake warning indicator during the bulb check or instrument cluster self test. If the indicator illuminated, go to the next step. If the indicator did not illuminate, go to step  8 .
    2. NOTE: The brake warning indicator illuminates with the park brake engaged or with low brake fluid.
  2. If the brake warning indicator is inoperative with the use of the park brake, go to next step. If the brake warning indicator is operative with the use of the park brake, go to step  5 .
  3. Turn the ignition off. Disconnect the park brake switch harness connector. Connect a jumper wire between the brake warning indicator circuit and ground. Turn the ignition on and observe the brake warning indicator. If the indicator illuminated, replace the park brake switch. If the indicator did not illuminate, go to next step.
  4. Turn the ignition off. Disconnect the instrument cluster harness connector. Disconnect the park brake switch harness connector. Measure the resistance of the brake warning indicator circuit. If the resistance is less than 5.0 ohms replace the instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article. If the resistance is more than 5.0 ohms, repair the brake warning indicator circuit for an open.
  5. 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. Connect a jumper wire between cavity A and cavity B of the brake fluid level switch harness connector. With the DRBIII, observe the brake fluid level input. If the brake fluid level input changed state, replace the brake fluid level switch. If the brake fluid level input did not change state, go to the next step.
  6. Turn the ignition off. Disconnect the brake fluid level switch harness connector. Measure the resistance of the brake fluid level switch ground circuit. If the resistance is more than 5.0 ohms repair the brake fluid level switch ground circuit for an open. If the resistance is less than 5.0 ohms, go to the next step.
  7. Turn the ignition off. Disconnect the PCM (C2 connector) harness connector. Disconnect the brake fluid level switch harness connector. Measure the resistance of the Red brake warning indicator driver circuit. If the resistance is more than 5.0 ohms repair the Red brake warning indicator driver circuit for an open. If the resistance is less than 5.0 ohms, replace the powertrain control module. See POWERTRAIN CONTROL MODULE  under REMOVAL & INSTALLATION.
  8. Turn the ignition off. Remove the instrument cluster. Remove the inoperative indicator LED. Using a DVOM, select DIODE MODE, and attach the leads across the LED. Ensure that the Red lead is on the + of the LED. If the LED illuminated, replace the instrument cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article. If the LED did not illuminate, replace the brake warning indicator LED. See INSTRUMENT CLUSTER BULBS & LEDS under REMOVAL & INSTALLATION in ANALOG INSTRUMENT PANELS article.
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