Grand Cherokee 4WD L6-242 4.0L VIN S MFI (1993)
Door Sensor/Switch (For Alarm): Description and Operation
The door ajar switches are mounted to the pillar in the rear of each door opening. They are plunger-type switches that are case grounded to the pillar.
When the door is open the switch is closed, and when the door is closed the switch is open.
The door ajar switches cannot be repaired and, if faulty or damaged, they must be replaced.