RAM 2500 Truck 4WD V10-8.0L VIN W HDC (2000)
Door Switch: Testing and Inspection
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS AND SEAT BELTS/AIRBAGS BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.
FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
1. Rotate the headlamp switch knob counterclockwise to ensure that the dome lamps are not switched OFF. Open the driver door and note whether
the interior lamps light They should light. If OK, see Key-In Ignition Switch and/or Headlamp Switch in the Diagnosis and Testing. If not OK, go
to Step 2.
2. Disconnect and isolate the battery negative cable. Unplug the driver door jamb switch from its wire harness connector. Check for continuity
between the ground circuit cavity of the driver door jamb switch wire harness connector and a good ground. There should be continuity. If OK, go
to Step 3. If not OK, repair the circuit to ground as required.
3. Check for continuity between the door jamb switch ground circuit terminal and each of the other two terminals of the driver door jamb switch.
There should be continuity with the switch plunger released, and no continuity with the switch plunger depressed. If OK, go to Step 4. If not OK,
replace the faulty switch.
4. Remove the Central Timer Module (CTM) from its mounting bracket to access the CTM wire harness connectors. Refer to Central Timer Module
in the Removal and Installation for the procedures. Unplug the 14-way CTM wire harness connector. Check for continuity between the driver door
switch sense circuit cavity of the 14-way CTM wire harness connector and a good ground. There should be no continuity. If OK, go to Step 5. If
not OK, repair the short circuit as required.
5. Check for continuity between the driver door switch sense circuit cavities of the 14-way CTM wire harness connector and the driver door jamb
switch wire harness connector. There should be continuity. If OK, see Key-In Ignition Switch and/or Headlamp Switch in the Diagnosis and
Testing. If not OK, repair the open circuit as required.
