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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Vehicle Access >> Diagnostic Information and Procedures >> Power Door Locks Inoperative - Rear >> Circuit/System Verification

Circuit/System Verification

  1. Verify that a test lamp connected to ground illuminates on the supply side of the unlock fuses 1 and 2 when an unlock switch is activated.
    • If the test lamp does not illuminate at either fuse perform the Rear Door Lock Relay Control Circuit Test.
    • If the test lamp illuminates at one or both fuses perform the appropriate Actuator Circuit Test.
  2. Verify that a test lamp connected to ground illuminates on the supply side of the lock fuses 1 and 2 when a lock switch is activated.
    • If the test lamp does not illuminate at either fuse perform the Rear Door Lock Relay Control Circuit Test.
    • If the test lamp illuminates at one or both fuses perform the appropriate Actuator Circuit Test.
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