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All Doors Fail To Unlock From Any Switch

  1. Turn ignition switch to OFF position. Disconnect Central Timer Module (CTM) connector C2. See COMPONENT LOCATIONS  . Disconnect passenger's Power Door Lock (PDL) switch harness connector. Measure resistance of door unlock switch sense circuit between CTM and passenger's PDL switch connector. Except on Dakota 2-door, measure resistance in Pink/Violet wire between CTM connector C2 terminal No. 13 and passenger's PDL switch connector. On Dakota 2-door, measure resistance in Light Green wire between CTM connector C2 terminal No. 4 and passenger's PDL switch connector. On all models, if reading is 5 ohms or more, repair open in Pink/Violet wire (Light Green wire on Dakota 2-door). If reading is less than 5 ohms, go to next step.
  2. Disconnect both PDL switches. Except on Dakota 2-door, measure resistance between ground and CTM connector C2 terminal No. 13 Pink/Violet wire. On Dakota 2-door, measure between ground and CTM C2 terminal No. 4 (Light Green wire). On all models, if reading is less than 100 ohms, repair short to ground in Pink/Violet wire (Light Green wire on Dakota 2-door). Perform BODY VERIFICATION TEST  . If reading is more than 100 ohms, go to next step.
  3. Replace CTM with a known-good unit and retest. Replace CTM as necessary. If problem exists with know good CTM, repeat testing or go to related procedure for symptoms present. See SYMPTOMS INDEX DIRECTORY  table. Perform BODY VERIFICATION TEST  .
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