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Driver Door Fails To Unlock From Any Switch

  1. Turn ignition switch to OFF position. Remove door unlock relay from relay and fuse center located next to Junction Block (JB). See COMPONENT LOCATIONS  . Measure voltage between ground and fused battery supply cavity for door unlock relay terminal No. 86 in relay and fuse center. See CONNECTOR IDENTIFICATION DIRECTORY  table. If reading is more than 10 volts, go to next step. If reading is 10 volts or less, locate and repair open in fused battery supply circuit (Red wire) for door unlock relay from JB fuse No. 13 (20-amp) on Dakota (15-amp on Durango).
  2. Disconnect CTM connector C2. Measure resistance of driver door unlock relay control circuit between CTM connector C2 terminal No. 7 (Red/Black wire) and cavity in relay and fuse center for driver door unlock relay terminal No. 85. If reading is less than 5 ohms, go to next step. If reading is 5 ohms or more, repair open in Red/Black wire. Perform BODY VERIFICATION TEST  .
  3. Using DVOM connected to ground, check for voltage at CTM harness connector C2 terminal No. 7 (Red/Black wire). If .5 volt or more exists, locate and repair short to voltage in driver door unlock relay control circuit (Red/Black wire). Perform BODY VERIFICATION TEST  . If reading is less than .5 volt, go to next step.
  4. Substitute a known-good driver door unlock relay. Restore any previously disconnected components. Retest system. If door locks operate as designed, replace driver door unlock relay. Perform BODY VERIFICATION TEST  . If condition remains, go to next step.
  5. Replace CTM with a known-good unit. Perform BODY VERIFICATION TEST  . Restore any previously disconnected components. Turn ignition switch to ON position. Retest door unlock operation from all door lock switches. If driver's door unlocks from all switches, replace CTM. Perform BODY VERIFICATION TEST  . If problem remains with known-good CTM, repeat testing or go to related procedure for other symptoms present. See SYMPTOMS INDEX DIRECTORY  table. Perform BODY VERIFICATION TEST  .
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