All Doors Except Driver's Fail To Lock & Unlock
- Turn headlights on. If right headlights operate, go to next step. If right headlights do not operate, diagnose headlight system first. See HEADLIGHT SYSTEMS article.
- Disconnect Gray 16-pin Central Timer Module (CTM) connector C2. CTM is located behind left side kick panel. Using DVOM, measure resistance between Gray 16-pin CTM connector C2 terminal No. 4 (Orange/Black wire) and No. 5 (Pink/Black wire). See Figure . If resistance is 3 ohms or less, go to next step. If resistance is more than 3 ohms, check for open in Orange/Black wire between Gray 16-pin CTM connector C2 terminal No. 4 and all door lock motors. Check for open in Pink/Black wire between Gray 16-pin CTM connector C2 terminal No. 5 and all door lock motors. Repair as necessary.
- Replace CTM. See CENTRAL TIMER MODULE under REMOVAL & INSTALLATION.