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DTC C1294: BRAKELIGHT Switch Circuit Always Active

  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
  2. Install scan tool. Turn ignition on, with engine off. Using scan tool, observe brake switch status parameter in the ABS data list. If scan tool displays RELEASED, go to next step. If scan tool does not display RELEASED, go to step  4 .
  3. Using scan tool, observe brake switch status parameter. If brake switch status parameter changes state, problem is intermittent. See INTERMITTENTS & POOR CONNECTIONS  under DIAGNOSIS & TESTING. If brake switch status does not change parameter, go to next step.
  4. Turn ignition off. Check brakelight switch and adjust and/or calibrate if necessary. After adjustments, go to step  11 . If adjustment was not necessary, go to next step.
  5. Turn ignition off. Disconnect brakelight switch connector. Turn ignition on, with engine off. Using scan tool, observe brake switch status parameter. If scan tool displays RELEASED, go to step  8 . If scan tool does not display RELEASED, go to next step.
  6. Check brakelight switch signal circuit for short to voltage. Repair as necessary. After repairs, go to step  11 . If circuit is okay, go to next step.
  7. Check EBCM harness connector for poor connections. Repair as necessary. After repairs, go to step  11 . If connections are okay, go to step  9 .
  8. Check stoplight switch harness connector for poor connections. Repair as necessary. After repairs, go to step  11 . If connections are okay, go to step  10 .
  9. Replace EBCM. After replacing EBCM, go to step  11 .
  10. Replace brakelight switch. After replacing switch, go to next step.
  11. Using scan tool, clear DTCs. Recheck DTCs. If DTC resets, go to step  2 . If DTC does not reset, system is okay.
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