Remote Switch: Testing and Inspection

DIAGNOSIS AND TESTING - REMOTE SWITCHES

WARNING: On vehicles equipped with airbags, refer to electrical, restraints 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.

Any diagnosis of the Audio system should begin with the use of the scan tool. For information on the use of the scan tool, refer to the appropriate Diagnostic Service Manual.

For complete circuit diagrams, refer to the appropriate wiring information.

1. Disconnect and isolate the battery negative cable.
2. Remove the remote radio switch(es) from the steering wheel. Remote Radio Switches - Removal.
3. Use an ohmmeter to check the switch resistance as shown in the Remote Radio Switch Test table
REMOTE RADIO SWITCH TEST






NOTE: The right remote radio switch back is white in color. The left switch back is black in color. The right/left remote radio switch orientation is with the steering wheel installed, and driver in driver's seat.

4. If the switch resistance checks OK, go to 5. If not OK, replace the faulty switch.
5. Check for continuity between the ground circuit cavity of the switch wire harness connector and a good ground. There should be continuity. If OK, go to 6. If not OK, repair the open circuit as required.
6. Unplug the connector from the Cab Compartment Node (CCN). Check for continuity between the radio control circuit cavity of the remote radio switch wire harness connector and a good ground. There should be no continuity. If OK, go to 7. If not OK, repair the short circuit as required.
7. Check for continuity between the radio control circuit cavities of the remote radio switch wire harness connector and the CCN wire harness connector. There should be continuity. If OK, refer to the proper Diagnostic Procedures manual to test the CCN and the CAN data bus. If not OK, repair the open circuit as required.