Town & Country V6-3.3L VIN R (2003)
Remote Switch: Description and Operation
Fig.10 Remote Radio Switch Operational View
A remote radio control switch option is available on some models. Two rocker-type switches are mounted on the back (instrument panel side) of the
steering wheel spokes. The switch ON the left spoke is the seek switch and has seek up, seek down, and preset station advance functions. The switch ON
the right spoke is the volume control switch and has volume up, and volume down functions. The switch ON the right spoke also includes a "mode"
control that allows the driver to sequentially select AM radio, FM radio, cassette player, CD player or CD changer (if equipped).
These switches are resistor multiplexed units that are hard-wired to the Body Control Module (BCM) through the clockspring. The BCM sends the
proper messages on the Programmable Communications Interface (PCI) data bus network to the radio receiver. For diagnosis of the BCM or the PCI
data bus, the use of a DRB III scan tool and the proper Diagnostic Procedures manual are recommended. For more information on the operation of the
remote radio switch controls, refer to the owner's manual in the vehicle glove box.