Circuit/System Testing
WARNING: This page is about a different car, the 2008 Pontiac Torrent and 2008 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Clear the DTC, ignition OFF, headlamp switch OFF, disconnect the high beam headlamp relay.
- Verify a test lamp illuminates between the negative battery terminal and the high beam headlamp relay control circuit.
- If the test lamp does not illuminate, replace the underhood fuseblock.
- Test for a short to voltage in the high beam headlamp relay control circuit.
- If all circuits/connections test normal, replace the BCM.