RAM 1500 Truck 4WD V8-5.7L VIN D (2005)
Remote Switch: Testing and Inspection
Any diagnosis of the Audio system should begin with the use of scan tool. For information on the use of the scan tool.
WARNING: DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, SEAT BELT
TENSIONER, SIDE AIRBAG, 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. Disconnect and isolate the battery negative cable.
2. Remove the remote radio switch(es) from the steering wheel.
Remote Radio Switch Test Table
3. Use an ohmmeter to check the switch resistances as shown in the Remote Radio Switch Test chart. If the remote radio switch resistances check
OK, go to Step 4. If not OK, replace the faulty switch.
4. Connect the battery negative cable. Turn the ignition switch to the On position. Check for 5 volts at the radio control MUX circuit cavities of the
steering wheel wire harness connectors for both remote radio switches. If OK, go to Step 5. If not OK, repair the open or shorted radio control
MUX circuit to the Integrated Power Module (IPM) as required.
5. Disconnect and isolate the battery negative cable. Disconnect the 22-way instrument panel wire harness connector from the IPM. Check for
continuity between the remote radio switch ground circuit cavities of the steering wheel wire harness connectors for both remote radio switches
and a good ground. There should be no continuity. If OK, go to Step 6. If not OK, repair the shorted remote radio switch ground circuit to the IPM
as required.
6. Check for continuity between the remote radio switch ground circuit cavities of the steering wheel wire harness connectors for both remote radio
switches and the 22-way instrument panel wire harness connector for the IPM. There should be continuity. If OK, refer to the proper Diagnostic
Procedures to test the IPM and the PCI data bus. If not OK, repair the open remote radio switch ground circuit as required.
