RAM 1500 Truck 2WD V6-3.9L VIN X (1999)
Heated Element: Testing and Inspection
Outside Mirror Heating Grid
1. Disconnect and isolate the battery negative cable. Remove the front door trim panel on the side of the vehicle with the inoperative outside mirror
heating grid. Unplug the wire harness connector at the mirror. Check for continuity between the ground circuit cavity in the body half of the power
mirror wire harness connector and a good ground. If OK, go to Step 2.If not OK, repair the open circuit to ground as required.
2. Connect the battery negative cable. Turn the ignition switch to the On position. Turn on the heated mirror system. Check for battery voltage at the
heated mirror switch output circuit cavity in the body half of the power mirror wire harness connector. If OK, go to Step 3. If not OK, repair the
open circuit to the heated mirror switch as required.
3. Check for continuity between the ground circuit and the heated mirror switch output circuit cavities in the mirror half of the power mirror wire
harness connector. There should be continuity If not OK, replace the faulty power mirror. If OK, check the resistance through the electric heating
grid. The correct resistance through the outside mirror heating grid should be from 10 to 16 ohms when measured at an ambient temperature of 21
° C (70° F). If not OK, replace the faulty power mirror.
