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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Cellular, Entertainment, And Navigation) >> Diagnostic Information and Procedures >> Video Entertainment System 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.
  1. Ignition OFF, disconnect the a/v box harness connector C2.
  2. Ignition ON, verify that a test lamp illuminates between the ground circuit terminal 9 and battery +.
    • If the test lamp does not illuminate, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 7 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for an open/high resistance.
    • If the circuit tests normal and the SEO ACCY fuse is open, test the B+l circuit terminal 7 for a short to ground.
  4. Ignition OFF, connect the a/v box harness connector C2
  5. Ignition ON, operate the DVD player in play mode.
  6. Is the system operating normally.
    • If yes, review the system operation with the customer.
    • If no, test the power and ground circuits to the DVD player.
  7. If the circuits test ok , replace the a/v box.
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