RAM 3500 Truck 2WD V10-8.0L VIN W MDC (1999)
Radio/Stereo Noise Filter Relay: Description and Operation
FILTER, CHOKE, AND SPEAKER RELAY
DESCRIPTION
Models equipped with the Infinity premium speaker package have a filter, choke, and speaker relay unit. The filter, choke, and speaker relay unit is
mounted to the lower instrument panel center brace, inboard of the Central Timer Module (CTM) and directly above the 16-way data link
connector. The filter, choke, and speaker relay unit can be accessed for service without instrument panel disassembly or removal.
The filter, choke, and speaker relay unit should be checked if there is no sound output noted from the speakers. The filter, choke, and speaker relay
unit cannot be repaired or adjusted and, if faulty or damaged, the unit must be replaced.
OPERATION
The filter, choke, and speaker relay unit is used to control the supply of fused battery current to the front door speaker-mounted dual amplifiers.
The speaker relay is energized by a fused 12 volt output from the radio receiver whenever the radio is turned on.
