Circuit/System Testing
- Ignition OFF, disconnect the driver power window switch.
- Ignition ON, verify that a test lamp illuminates between the driver power window switch voltage supply circuit and ground.
- If the test lamp does not illuminate, repair the power window switch voltage supply circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
- Verify that a test lamp illuminates between the driver power window switch voltage supply circuit and the driver power window switch ground circuit at the driver power window switch harness connector.
- If the test lamp does not illuminate, repair the driver power window switch ground circuit for a short to voltage or an open/high resistance.
- If all circuits test normal, test or replace the driver power window switch.