RAM 3500 Truck 4WD L6-5.9L DSL Turbo VIN C (2002)
Body Control Module: Description and Operation
Audio System
AUDIO SYSTEM
The factory-installed radio receiver communicates on the Chrysler Collision Detection (CCD) data bus network through a separate two-way wire harness
connector. This is used for the remote radio switches that are mounted to the steering wheel, and also used for radio diagnosis with the DRB III (R).
The remote radio switches are resistor multiplexed units that are hard wired to the high line 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.
The Infinity speakers used in the premium speaker system are driven by dual amplifiers that are integral to each of the front door speakers. One of these
dual amplifiers drives the front door speaker and the A-pillar mounted tweeter for that side of the vehicle, while the other amplifier drives the rear
speaker for that side of the vehicle.
The filter, choke, and power relay unit is used to control the supply of fused battery current to the front door speaker-mounted dual amplifiers.
