Grand Caravan AWD V6-229 3.8L VIN L MFI (1997)
Instrument Panel Bulb: Description and Operation
CIRCUIT OPERATION
The display intensity of the instrument cluster, radio, HVAC control, and various other items in this vehicle is controlled by the Body Control
Module (BCM).
Circuit E2 supplies power to the lamps controlled by the BCM.
Circuit L78 supplies power to fuse 1, a 10 amp in the junction block, when the park lamp relay is energized. Circuit E1 connects from the fuse to
the BCM and supplies a park lamp ON input.
The E92 circuit from the headlamp dimmer switch provides the dimmer switch signal to the BCM. The BCM measures the resistance to ground on
this circuit and adjusts the voltage level on circuit E2 to the proper level.
