RAM 1500 Truck 2WD V6-3.9L VIN X (1999)
Door Sensor/Switch (For Alarm): Description and Operation
SYSTEM OPERATION
The door jamb switches are mounted to the door hinge pillars. The switches close a path to ground for the Central Timer Module (CTM) when a
door is opened, and open the ground path when a door is closed.
The door jamb switches cannot be repaired and, if faulty or damaged, they must be replaced.