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.
- Disconnect the right rear window switch connector and connect a test lamp from the down signal circuit to ground.
- Ignition ON, verify that the test lamp illuminates when the right rear down switch on the DDS is activated.
- If the test lamp does not illuminate test the right rear window down signal circuit for a short to ground. If the circuit tests normal replace the BCM.
- If the circuits test normal replace the right rear window switch.