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Home >> Oldsmobile >> 1998 >> Cutlass GL >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Anti-Lock Brake System) >> Diagnostic Trouble Codes (DTCS) >> DTC C1294: BRAKELIGHT Switch Circuit Always Active

DTC C1294: BRAKELIGHT Switch Circuit Always Active

WARNING: This page is about a different car, the 1997 Oldsmobile Cutlass and 1997 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK  . After performing diagnostic system check, go to next step.
  2. Turn ignition off. Ensure no pressure is applied to brake pedal. Observe rear brakelights. If rear brake lights are on, go to next step. If rear brake lights are not on, go to step 5).
  3. Disconnect brakelight switch connector C1. If rear brake lights are on, go to step 8). If rear brake lights are not on, go to next step.
  4. Check for proper adjustment of brakelight switch. See BRAKE SYSTEM article. If brakelight switch is properly adjusted, go to step 10). If brakelight switch is not properly adjusted, go to step 9).
  5. Disconnect EBCM/EBTCM connector. Turn ignition on, with engine off. Using DVOM, measure voltage between brake switch input circuit of EBCM/EBTCM connector and ground. See WIRING DIAGRAM  . If voltage is 0-2 volts, go to next step. If voltage is not 0-2 volts, go to step 8).
  6. Turn ignition off. Check EBCM/EBTCM connector and harness connector for poor terminal contact, corrosion or damage. If connectors are faulty, go to step 11). If connectors are okay, go to next step.
  7. Reconnect EBCM/EBTCM connector. Install scan tool. Turn ignition on, with engine off. Start engine and test drive vehicle obtaining speed of at least 25 MPH. Repeat drive sequence 2 more times. Using scan tool, display DTCs. If DTC C1294 sets in last 3 drive cycles, go to step 12). If DTC C1294 does not set in last 3 drive cycles, go to step 13).
  8. Repair short to voltage in brake switch input circuit between brakelight switch and EBCM/EBTCM. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
  9. Adjust brakelight switch. See BRAKE SYSTEM article. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
  10. Replace brakelight switch. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
  11. Replace all faulty terminals or connectors. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
  12. Replace EBCM/EBTCM. After repairs, perform DIAGNOSTIC SYSTEM CHECK  .
  13. Malfunction is not currently present. An intermittent may be caused by a poor connection, rubbed through wire insulation, or a broken wire inside insulation. Frequency of malfunction can be determined by using enhanced diagnostic function of scan tool. Check for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or damaged wiring harness.
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