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Driver's Door Fails To Lock/Unlock

  1. Remove driver's front door inner trim panel. Disconnect Driver's Door Module (DDM) C1 connector. Ensure driver's power window is down and door is locked. Connect a jumper wire between DDM C1 connector terminals No. 4 (Black wire) and No. 5 (Orange/Black wire). See Figure . Connect a jumper wire to DDM C1 connector terminal No. 7 (Pink/Black wire) and momentarily touch DDM C1 connector terminal No. 1 (Tan/Light Blue wire). If driver's door unlocks, replace DDM. See POWER WINDOWS - GRAND CHEROKEE article. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS. If driver's door does not unlock, go to next step.
  2. Remove jumper wire. Disconnect door lock motor/ajar switch connector. Using DVOM, measure resistance of Pink/Black wire between DDM C1 connector terminal No. 7 and door lock motor/ajar switch connector terminal No. 3. See Figure and Figure . If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open Pink/Black wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  3. Using DVOM, measure resistance of Orange/Black wire between DDM C1 connector terminal No. 5 and door lock motor/ajar switch connector terminal No. 4. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Orange/Black wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  4. Replace defective door lock motor/ajar switch. See appropriate POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS article. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
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