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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.
  1. Ignition OFF, disconnect the harness connectors at the BCM.
  2. 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.
  3. 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.
  4. If all circuits test normal, replace the BCM.
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