Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
- Thoroughly inspect any circuitry that may be causing the complaint for the following conditions:
- Backed out terminals
- Improper mating
- Broken locks
- Improperly formed or damaged terminals
- Poor terminal-to-wiring connections
- Physical damage to the wiring harness
- Possible causes of this DTC are the following conditions:
- A signal circuit of the stop lamp switch is open
- The stop lamp switch is misadjusted
- Verify proper stop lamp switch operation using the data list of the scan tool. As the brake is applied, the data list displays the stop lamp switch ON within 2.54 cm (1 in) of travel
- All brake lamps are open
- All brake lamp grounds are open
- Circuit has a wiring problem, terminal corrosion, or poor connections
- Loose or corroded EBCM ground
- If an intermittent malfunction exists refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.