RAM 2500 Truck 4WD V10-8.0L VIN W (1997)
Cruise Control Switch: Description and Operation
SYSTEM OPERATION
The speed control switch module is mounted to the center of the steering wheel below the driver's airbag module. Three momentary contact
switches, supporting six different speed control functions are used. The outputs from these switches are filtered into one input. The Powertrain
Control Module (PCM) determines which output has been applied through resistive multiplexing. The input circuit voltage is measured by the
PCM to determine which switch function has been selected.
An indicator lamp (LED) located on the switch module is energized by the PCM. This occurs when the speed control system has been engaged.
The three switches are labeled: OFF/ON, RESUME/ACCEL, SET/DECEL.The individual switches cannot be repaired. If one individual switch
fails, or the indicator lamp fails, the entire switch module must be replaced.
