Locks Do Not Operate From Either Switch
- Backprobe Multi-Function Alarm Lock and Lighting (MALL) module connector C1 with test light between terminal "H" (Orange wire) and ground. MALL module is located behind right side of instrument panel. If test light does not glow, repair open Orange wire. If Orange wire is okay, check CTSY LP power mirror fuse. If test light glows, backprobe test light between MALL module connector terminals "H" (Orange wire) and "D" (Black wire).
- If test light does not glow, check for poor connection at MALL module. If connection is okay, repair open circuit in Black wire. If test light glows, measure resistance by backprobing left or right front door lock switch connector between terminal "B" (Black wire) and ground. If measurement is less than 5 ohms, go to next step. If measurement is greater than 5 ohms, check for open circuit in Black wire between door lock switch connector and ground.
- Backprobe MALL module connector C1 with a test light between terminals "A" (Tan wire) and "C" (Gray wire). Observe test light and depress door lock switch to lock position and unlock position. If test light comes on in both cases, go to next step. If test light does not come on in both cases, check for poor connection at MALL module. If connection is okay, replace MALL module.
- Backprobe any door lock motor connector with a test light between terminal "A" (Tan wire) and ground. While observing test light, depress door lock switch to lock position. If test light comes on, check for poor connection at MALL module or open circuit in Tan wire. If test light does not come on, check for poor connection at MALL module or open circuit in Gray wire.