RAM 3500 Truck 2WD V10-8.0L VIN W HDC (2000)
Overdrive Switch: Description and Operation
DESCRIPTION
The overdrive OFF (control) switch is located in the shift lever arm.
OPERATION
The switch is a momentary contact device that signals the PCM to toggle current status of the overdrive function. At key-on, overdrive operation is
allowed. Pressing the switch once causes the overdrive OFF mode to be entered and the overdrive OFF switch lamp to be illuminated. Pressing the
switch a second time causes normal overdrive operation to be restored and the overdrive lamp to be turned off. The overdrive OFF mode defaults to
ON after the ignition switch is cycled OFF and ON. The normal position for the control switch is the ON position. The switch must be in this position
to energize the solenoid and allow a 3-4 upshift. The control switch indicator light illuminates only when the overdrive switch is turned to the OFF
position, or when illuminated by the transmission control module.
