Circuit/System Testing
WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector of the brake switch.
- Ignition ON, verify that a test lamp does not illuminate between the stop lamp switch TCC brake signal circuit terminal A and ground.
- If the test lamp illuminates, test the TCC brake signal circuit for a short to voltage.
- If all circuits test normal, replace the stop lamp switch.