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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 437 (Wiper System And Washer System) >> Diagnostic Information and Procedures >> Rear Wiper Washer System Malfunction >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, verify the rear wiper operates normally using the rear wiper switch.
  2. Connect a test lamp between the relay side of the REAR WASH fuse and ground.
  3. Verify that the test lamp turns on and off while pressing and releasing the rear window washer switch.
    • If the test lamp does not turn on and off while changing between the commanded states, refer to the Rear Washer Pump Relay Control Circuit Test.
  4. If the rear washer pump does not operate properly, refer to the Rear Washer Pump Circuit Test.
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