Diagnostic Aids

If the Drivers Door will not lock check for a loose connection at the K9 Body Control Module connector X5 Terminal 8. If a loose connection is found repair or replace the connector.
Verify the smooth and consistent mechanical operation of each part of the door latch system prior to performing extensive electrical diagnostics. Any door that does not function smoothly or consistently, refer to Door Will Not Open/Close, Door Binding, or Locks, Handles, or Cylinders Do Not Function