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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 456 (Fixed And MOVEABLE Windows) >> Diagnostic Information and Procedures >> Power Windows Malfunction (RPO X88/Z88) >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON, observe the operation of each power window while commanding the window UP and DOWN by using their local door window switches, each window should perform the UP and DOWN function from each switch.
    • If the driver window does not perform the UP or DOWN function, refer to Driver Window Malfunction.
    • If the front passenger window does not perform the UP or DOWN function, refer to Passenger Window Malfunction.
    • If either rear passenger power window does not perform the UP or DOWN function, refer to Rear Passenger Window Malfunction.
  2. Command the left rear window and right rear window UP and DOWN with a scan tool, each rear window should perform the UP and DOWN function.
    • If either rear passenger power window malfunctions, refer to Rear Passenger Window Malfunction.
  3. Observe the scan tool Driver RF Window Switch, Driver LR Window Switch and Driver RR Window Switch parameters while using the driver master control switches. The parameter should change between Off, Up, Down and Express Down.
    • If the value does not change, replace the driver door lock/window switch.
  4. Observe the scan tool Window Lockout Switch parameter while pressing and depressing the window lockout switch on the driver master control. The parameter should change between On and Off.
    • If the value does not change, replace the driver door lock/window switch.
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