Visual & Operational Inspection

Before performing tests, perform a visual inspection of the following items:

• Inspect DOOR LOCKS fuse (10-amp) for an open. If fuse is open, check Orange wire for a short to ground between fuse block and door lock relay.
• Inspect BCM fuse (10-amp) for an open. If fuse is open, check Orange wire for a short to ground between fuse block and BCM.
• Inspect ground located behind right side of instrument panel.
• Inspect ground located behind left side of instrument panel, on left side of steering column.
• Inspect ground located on left front door wiring harness, in "A" pillar.
• Inspect door lock system for mechanical binding.
• If one actuator does not operate properly, but other actuators operate normally, inspect wiring to suspect actuator. If wiring is okay, check for a poor connection. If no poor connections are found, replace suspect actuator.
• Each door lock actuator contains an electronic circuit breaker. Resistance in door lock actuator will increase if door lock actuator is overloaded. Resistance will return to normal after voltage is removed from actuator terminals. Check for a broken or partially broken wire inside wire insulation which could cause a system malfunction but check good during a continuity or voltage check.
• If lock and unlock modes are not functioning properly, set the mode to desired customer operation and test its function. If mode is inoperative, check for Diagnostic Trouble Codes (DTC). See SELF-DIAGNOSTIC SYSTEM  . If no DTCs are present, see SYMPTOM INDEX  table under SYMPTOM TESTS.
• If Content Theft Deterrent (CTD) system is active, doors cannot be unlocked. Disable CTD system by unlocking doors using door lock cylinder switch or Remote Keyless Entry (RKE) transmitter. Check if door locks operate normally.
• Always check terminal contact before replacing any component.
• Inspect for proper installation of aftermarket electronic equipment which may affect system operation.