DTC C1294: BRAKELIGHT Switch Circuit Always Active: Diagnosis

2001 Chevrolet Corvette Base, 2D Convertible, StandardSECTION Diagnosis
  1. Perform DIAGNOSTIC SYSTEM CHECK  . Go to next step.
  2. Install scan tool. Turn ignition on, engine off. Using scan tool, observe STOP LAMP SWITCH parameter in TCS data list. If scan tool displays RELEASED, go to next step. If scan tool does not display RELEASED, go to step  4 .
  3. Press brake pedal. Using scan tool, observe STOP LAMP SWITCH parameter. If STOP LAMP SWITCH parameter changes state, see DIAGNOSTIC AIDS  . If STOP LAMP SWITCH parameter does not change states, go to next step.
  4. Turn ignition off. Inspect stoplight switch and adjust and/or calibrate if needed. If problem was found, repair as necessary. After repairs, go to step  11 . If problem was not found, go to next step.
  5. Turn ignition off. Disconnect stoplight switch connector. Turn ignition on, engine off. Using scan tool, observe STOP LAMP SWITCH parameter. If scan tool displays RELEASED, go to step  8 . If scan tool does not display RELEASED, go to next step.
  6. Check White wire between stoplight switch and EBCM for short to voltage. If problem was found, repair as necessary. After repairs, go to step  11 . If problem was not found, go to next step.
  7. Check EBCM connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  11 . If problem was not found, go to step  9 .
  8. Check stoplight switch connector for poor connections. If problem was found, repair as necessary. After repairs, go to step  11 . If problem was not found, go to step  10 .
  9. Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULE  under REMOVAL & INSTALLATION. After repairs, go to step  11 .
  10. Replace stoplight switch. See STOPLIGHT SWITCH  under REMOVAL & INSTALLATION. After repairs, go to next step.
  11. Using scan tool, clear DTCs. Operate vehicle. If DTC does not reset, system is okay.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.