Circuit/System Testing
WARNING: This page is about a different car, the 2011 GMC Acadia, 2011 Chevrolet Traverse, and 2011 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
- Connect a test lamp between control circuit terminal 1 and ground.
- 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.
- Ignition OFF, connect a test lamp between the control circuit terminal 3 and ground.
- Connect a 3 A fused jumper wire between the signal circuit terminal 6 and ground.
- 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.
- If all circuits test normal, test or replace the liftgate latch assembly.