RAM SRT-10 Pickup V10-505 8.3L (2004)
Seat Heater Switch: Testing and Inspection
Refer to Wiring Diagrams for connector pin-outs and the location of complete heated seat system wiring diagrams.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE
(GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE
PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM.
FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
1. If the problem being diagnosed involves inoperative heated seat switch back lighting and the cluster illumination lamps operate, go to Step 2. If the
problem being diagnosed involves inoperative heated seat switch back lighting and the cluster illumination lamps are also inoperative. If the
problem being diagnosed involves inoperative heated seat switch indicator lamps and the heated seat elements do not heat, proceed. If the problem
being diagnosed involves inoperative heated seat switch indicator lamps and the heated seat elements do heat, go to Step 6. If the problem being
diagnosed involves a heated seat switch indicator lamp that remains illuminated after the heated seat has been turned Off.
2. Disconnect and isolate the battery negative cable. Remove the heated seat switch and bezel unit from the instrument panel. Disconnect the heated
seat switch to be tested. Check for continuity between the ground circuit cavity of the heated seat switch and a good ground. There should be
continuity. If OK, go to Step 3. If not OK, repair the open ground circuit to ground as required.
3. Reconnect the battery negative cable. Turn the park lamps on with the headlamp switch. Rotate the panel lamps dimmer thumb wheel on the
headlamp switch upward to just before the interior lamps detent. Check for battery voltage at the fused panel lamps dimmer circuit cavity of the
heated seat switch. If OK, go to Step 4. If not OK, repair the open fused panel lamps dimmer switch signal circuit to the fuse in the Integrated
Power Module as required.
4. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output (run) circuit cavity of the heated seat
switch. If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run) circuit as required.
5. Check the continuity and resistance values of the heated seat switch in the Neutral, Low and High positions as shown in the Heated Seat Switch
Continuity chart. If OK, refer to Step 6. If not OK, replace the faulty heated seat switch.
6. Replace the inoperative heated seat switch with a known good unit and test the operation of the switch indicator lamps. If OK, discard the faulty
heated seat switch. If not OK.
