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Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Outlook. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector X3 at the PLGM.
  2. Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal 1 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the PLGM.
  3. Ignition OFF, test for less than 1.0 ohm of resistance between the control circuit terminal 2 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the PLGM.
  4. Connect a test lamp between control circuit terminal 1 and control circuit terminal 2.
  5. Command the power liftgate to OPEN and CLOSE with a scan tool. The test lamp should turn ON when commanding the OPEN and CLOSE states.
    • If the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal, replace the PLGM.
  6. If all circuits test normal, test or replace the liftgate motor assembly.
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