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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
  2. Connect a test lamp between control circuit terminal 1 and ground.
  3. Ignition ON, command the liftgate to OPEN by pressing and releasing the liftgate interior control switch. The test lamp should illuminate while commanding the OPEN state.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the liftgate control module.
    • If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the liftgate control module.
  4. Ignition OFF, connect a test lamp between the control circuit terminal 3 and ground.
  5. Connect a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
  6. Ignition ON, command the liftgate to CLOSE by pressing and releasing the liftgate interior control switch. The test lamp should illuminate while commanding the CLOSE state.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the liftgate control module.
    • If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the liftgate control module.
  7. If all circuits test normal, test or replace the liftgate latch assembly.
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