RAM 3500 Truck 4WD V8-5.9L VIN Z LDC (2000)
Remote Switch: Description and Operation
REMOTE RADIO SWITCH
A remote radio switch option is available on models equipped with the AM/FM/CD/cassette/3-band graphic equalizer (RAZ sales code) radio
receiver and the high-line Central Timer Module (CTM). Refer to Central Timer Module in the Description and Operation of Instrument Panel
Systems for more information on this component.
Remote Radio switches
Two rocker-type switches are mounted in the sides of the rear (instrument panel side) steering wheel trim cover. The switch on the left side is the
seek switch and has seek up, seek down, and preset station advance functions. The switch on the right side is the volume control switch and has
volume up, and volume down functions. The two switches are retained in mounting holes located on each side of the rear steering wheel trim cover
by four latches that are integral to the switches.
The remote radio switches share a common steering wheel wire harness with the vehicle speed control switches. The steering wheel wire harness is
connected to the instrument panel wire harness through the clockspring. Refer to Clockspring in the Description and Operation of Airbags and Seat
Belts/Airbags for more information on this component.
The remote radio switches are resistor multiplexed units that are hard wired to the high-line or premium CTM through the clockspring. The CTM
monitors the status of the remote radio switches and sends the proper switch status messages on the Chrysler Collision Detection (CCD) data bus
network to the radio receiver. The electronic circuitry within the radio is programmed to respond to these remote radio switch status messages by
adjusting the radio settings as requested.
For diagnosis of the CTM or the CCD data bus, the use of a DRB III scan tool and the proper Diagnostic Procedures are recommended. For more
information on the features and control functions for each of the remote radio switches, see the owner's manual in the vehicle glove box.
