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Test 6: Stoplight Switch

  1. Verify normal operation of stoplight system. If stoplight system operates correctly, go to step 9). If stoplight system does not operate correctly, ensure STOP fuse is okay. If STOP fuse is okay, go to step 4). Replace fuse if needed. If fuse fails again, go to step 2). If fuse does not fail again, go to step 3).
  2. If STOP fuse fails after replacement, disconnect CC ECU connector and replace fuse. If fuse fails again repair short in harness between stoplight switch terminal and STOP fuse or between CC ECU terminal and STOP fuse. See STOPLIGHT SWITCH TO STOP FUSE CIRCUIT  table.
    STOPLIGHT SWITCH TO STOP FUSE CIRCUIT

    Stoplight Switch Terminal CC ECU Terminal
    2 (GRN/BLU) 1 (GRN/BLU)
  3. If STOP fuse does not fail after replacement, depress brake pedal and inspect STOP fuse. If fuse does not fail, replace CC ECU and retest system. If fuse fails again, repair short in harness between stoplight terminal and stoplights or between CC ECU terminal and stoplights. See STOPLIGHT SWITCH TO STOPLIGHTS CIRCUIT  table.
    STOPLIGHT SWITCH TO STOPLIGHTS CIRCUIT

    Stoplight Switch Terminal CC ECU Terminal
    1 (GRN/WHT) 16 (GRN/WHT)
  4. Ensure stoplights come on when brake pedal is depressed. If stoplights do not come on, ensure .02-.09" (.5-2.3 mm) clearance between stoplight switch and brake pedal stop. Loosen switch lock nut to adjust clearance. If stoplights do not come on after adjusting switch when brake pedal is depressed, disconnect 4-pin stoplight switch connector and go to next step.
  5. Depress brake pedal (stoplight switch pin free). Ensure continuity exists between stoplight switch connector terminals No. 1 (Green/White wire) and No. 2 (Green/Blue wire).
  6. Release brake pedal (stoplight switch pin pushed in). Ensure continuity exists between stoplight switch connector terminals No. 3 (Red wire) or No. 2 and No. 4 (Red/Green wire). If continuity is not as specified, replace stoplight switch and retest system. If stoplight switch is okay, go to next step.
  7. Disconnect stoplight switch connector. Ensure battery voltage between stoplight connector terminal No. 2 (Green/Blue wire) and STOP fuse. If battery voltage is present, go to next step. If battery voltage is not present, repair open in harness between stoplight connector terminal No. 2 and STOP fuse.
  8. Using a jumper wire, connect stoplight connector terminals No. 1 (Green/Blue wire) and No. 2 (Green/White wire). If brake lights come on, go to next step. If brake lights do not come on, repair open in harness between stoplight connector terminal No. 1 and ground.
  9. If stoplight system is operating normally, start testing with this step. Connect stoplight connector and disconnect CC ECU connector. Ensure battery voltage between ground and CC ECU connector terminal No. 1 (Green/Blue wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in harness between terminal No. 1 or No. A2 or No. 18 and STOP fuse.
  10. Ensure battery voltage, when brake pedal is depressed, between ground and CC ECU terminal No. 16. If battery voltage is present, replace CC ECU and retest system. If battery voltage is not present, repair open in harness between CC ECU connector terminal No. 16 or No. A3 or No. 17 and stoplight switch terminal No. 1, Green/White wire.
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