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Home >> Chevrolet >> 2010 >> Traverse LS, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 216 (Lighting System) >> Diagnostic Information and Procedures >> DTC B3600 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 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 headlamp switch.
  2. Ignition OFF, verify a test lamp illuminates between B+ and the ground circuit terminal 8
    • If less test lamp does not illuminate, test the ground circuit for an open/high resistance.
  3. Ignition ON, test for B+ between the B+ circuit terminal 15 and ground.
    • If less than the specified range, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Verify the scan tool Dimming Control Signal parameter is less than 0.2 volts.
    • If greater than the specified range, test the signal circuit terminal 13 for a short to voltage. If the circuit tests normal, replace the BCM.
  5. Install a 3A fused jumper wire between the signal circuit terminal 13 and the B+ circuit terminal 15. Verify the scan tool Dimming Control Signal parameter is greater than 2.5 volts.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  6. If all circuits test normal, test or replace the headlamp switch.
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