Dakota 4WD V6-3.9L VIN X (1997)
Overdrive Indicator Lamp: Description and Operation
SYSTEM OPERATION
The overdrive-off indicator lamp gives the driver an indication that the automatic transmission overdrive has been locked out. The lamp is
controlled by the Powertrain Control Module (PCM) on a hard-wired circuit to instrument cluster.
The PCM uses an input from the momentary overdrive lockout switch on the end of the automatic transmission gearshift selector lever to decide
whether to turn the lamp on or off. The PCM then controls the lamp ground based upon the overdrive lockout switch input and its internal
programming.
