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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Fixed And MOVEABLE Windows) >> Diagnostic Information and Procedures >> Midgate Power Window Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.

Midgate Power Window Inoperative

  1. Disconnect the midgate control module connector.
  2. Verify that a test lamp illuminates between the battery supply circuits and ground.
    • If the test lamp does not illuminate repair the battery supply circuits for an open/high resistance or short to ground.
  3. Ignition ON, verify that a test lamp illuminates between the accessory supply circuit and ground.
    • If the test lamp does not illuminate repair the accessory supply circuit for an open/high resistance or short to ground.
  4. Ignition OFF, verify that a test lamp illuminates between the ground circuits and battery voltage.
    • If the test lamp does not illuminate repair the ground circuits for an open/high resistance.
  5. Ignition ON, the down switch signal circuit should at or near battery voltage while the IP switch is held in the down position.
    • If the circuit is not at battery voltage repair the down switch signal circuit for an open/high resistance or a short to ground.
  6. If all the circuits test normal replace the window motor assembly.
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