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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> DTC B2610 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the affected component.
  2. Ignition OFF, verify that a test lamp illuminates between the listed ground circuit terminal and battery voltage.
    • Left steering wheel switch terminal 8
    • Right steering wheel switch terminal 1
    • Windshield wiper/washer switch terminal 1
    • Analog clock terminal 2
    • DIC switch terminal 5
    • If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
  3. Connect a test lamp between the listed LED dimming control circuit terminal and ground.
    • Left steering wheel switch terminal 6
    • Right steering wheel switch terminal 2
    • Windshield wiper/washer switch terminal 4
    • Analog clock terminal 3
    • DIC switch terminal 4
    • Radio terminal 8 X1
  4. Command the dimming test high to low with a scan tool. The test lamp should turn from bright to dim when changing between the commanded states.
    • If the test lamp is always off, test the control circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always bright, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the affected component.
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