Manual:HUMMER Hummer H3 Base 2010Page:21154 / 37523



Circuit/System Testing — 2010 Hummer H3 Base, Automatic Service Manual

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector X2 at the driver door lock switch and disconnect the harness connector at the passenger door lock switch.
  2. Connect a test lamp between the control circuit terminal 7 and B+.
  3. Ignition ON, command the door lock actuators to LOCK with a scan tool. The test lamp should illuminate when commanding the LOCK state.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition OFF, connect the harness connector at the passenger door lock switch.
  5. Ignition ON, command the door lock actuators to LOCK by using the passenger door lock switch. The test lamp should illuminate during the LOCK command.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the passenger door lock switch.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the passenger door lock switch.
  6. If all circuits test normal, replace the driver door lock switch.