Preliminary Inspection

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

• Inspect RAP fuse for an open (located in underhood MaxiFuse(R) block). If fuse is open, check Red wire for short to ground between fuse block and affected module.
• Inspect DDM fuse for an open (located in rear junction block, under rear seat). If fuse is open, check Orange wire for short to ground between junction block and DDM.
• Inspect PDM fuse for an open (located in instrument panel fuse block). If fuse is open, check Orange wire for short to ground between fuse block PDM.
• Inspect RDM fuse for an open (located in rear junction block, under rear seat). If fuse is open, check Orange wire for short to ground between junction block and RDM.
• Inspect ground connectors located behind left and right kick panel, and on right rear wheelhousing.
• 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 connections are okay, 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.
• Always check terminal contact before replacing any component.
• Inspect for proper installation of aftermarket electronic equipment which may affect system operation.