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Test C: Unlock Inoperative, Lock Operates

  1. Turn ignition on. Attempt to operate lock function on both doors. Attempt to operate unlock function on both doors. Verify lock function does not operate properly but unlock function does operate properly. If both lock function and unlock function work properly on both doors, problem is intermittent. If both lock function and unlock function do not work properly, go to next step.
  2. Using DVOM to check continuity, connect between Body Control Module (BCM) connector C1, terminal "D" (Orange/Black wire) and ground. See Figure . While observing DVOM, press either UNLOCK button on door lock switches. If continuity exists, go to next step. If continuity does not exist, go to step  5 .
  3. Test BCM connector C1 for poor connections. If problem was found, repair as necessary, and then go to step  6 . If problem was not found, go to next step.
  4. Replace BCM. See appropriate BODY CONTROL MODULES article. After repairs, go to step  6 .
  5. Repair open in Orange/Black wire between BCM and splice S268. After repairs, go to next step.
  6. Operate system to verify repair.
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