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Circuit/System Testing

  1. Ignition OFF, disconnect the X2 harness connector at the K39 liftgate control module.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect the X2 harness connector and disconnect the X3 harness connector at the K39 liftgate control module.
  4. Test for infinite resistance between the control circuit terminal 1 and ground.
    • If not the specified value, replace the liftgate actuator assembly.
  5. Test for infinite resistance between the control circuit terminal 2 and ground.
    • If not the specified value, replace the liftgate actuator assembly.
  6. Test for less than 25 Ω between the control circuit terminal 1 and the control circuit terminal 2.
    • If greater than the specified range, replace the liftgate actuator assembly.
  7. If all circuits test normal, replace the K39 liftgate control module.
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