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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 491 (Power Outlets) >> Diagnostic Information and Procedures >> Power Outlet Receptacle Malfunction (110V AC) >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connectors at the T1 Accessory DC/AC power inverter module.
  2. Test for less than 10 Ω between the ground circuit terminal 1 X2 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ circuit terminal 2 X2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Ignition ON, test for less than 1.0 V between the AC circuit terminals listed below and ground:
    • Terminal 4 X1
    • Terminal 6 X1
    • If greater than the specified range, test the AC circuit for a short to voltage.
  5. Ignition OFF, test for infinite resistance between the AC circuit terminals listed below and ground:
    • Terminal 4 X1
    • Terminal 6 X1
    • If less than the specified value, test the AC circuit for a short to ground.
  6. Disconnect the harness connector at the X81 accessory power receptacle - 110 V AC.
  7. Ignition ON, verify a test lamp illuminates between the control circuit terminal 4 and ground.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.
  8. Verify a test lamp does not illuminate between the signal terminal 1 and ground.
    • If the test lamp illuminates, test the signal circuit for a short to voltage. If the circuit tests normal, replace the T1 Accessory DC/AC power inverter module.
  9. Connect a 3 A fused jumper between the control terminal 4 and the signal terminal 1.
  10. Ignition ON, verify that a test lamp illuminates between the T1 Accessory DC/AC power inverter module signal circuit terminal 2 X1 and ground.
    • If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance.
  11. Ignition OFF, connect the harness connectors at the T1 Accessory DC/AC power inverter module. Ignition ON, test for 110-120 V AC between the X81 accessory power receptacle - 110 V AC terminal 3 and 6.
    • If not within the specified range, check both AC circuits for an open/high resistance. If all circuits test normal, replace the T1 Accessory DC/AC power inverter module.
  12. If all circuits test normal, replace the X81 accessory power receptacle - 110 V AC.
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