Circuit/System Testing
WARNING: This page is about a different car, the 2008 Pontiac G8. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connectors at the BCM.
- Ignition OFF, test for less than 3 Ω between the ground circuit terminal 9 X4 and ground.
- If greater than the specified range, test the ground circuit for an open/high resistance.
- Ignition On, verify that a test lamp illuminates between the B+ circuit terminals listed below and ground.
- Terminal 3 X3
- Terminal 10 X4
- If the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.
- If all circuits test normal, replace the BCM.