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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Saturn Outlook, 2010 GMC Acadia, 2010 Chevrolet Traverse, and 2010 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the appropriate headlamp assembly.
  2. Disconnect the negative terminal of the C1 Battery.
  3. Test for less than 5 Ω between the ground circuit terminal 8 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  4. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  5. Reconnect the negative terminal to the C1 Battery.
  6. Ignition ON, headlamps ON, connect a test lamp between the ignition circuit terminal B and ground. The test lamp should illuminate.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  7. Ignition OFF, disconnect the X2 harness connector at the K26 Headlamp Control Module
  8. Ignition ON, connect a test lamp between the ignition circuit terminal 9 (X1) at the K26 Headlamp Control Module and ground. The test lamp should illuminate.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  9. If all circuits test normal, replace the appropriate headlamp assembly. Verify that the customer concern is not still present.
    • If the customer concern is still present, replace the K26 Headlamp Control Module.
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