Grand Caravan FWD L4-2.4L VIN B (1997)
Oil Pressure Warning Lamp/Indicator: Description and Operation
CIRCUIT OPERATION
The low oil pressure lamp is used to indicate to the operator that the engine oil pressure has fallen below a pre-determined level.
Power for the lamp is supplied on circuit V23. This circuit is HOT in the START and RUN position only and protected by a 20 Amp fuse located
in cavity 3 of the junction block.
Circuit A21 connects from the ignition switch to the fuse to supply power.
Battery voltage for the A21 circuit is supplied on circuit A1. This circuit originates at the Power Distribution Center (PDC) and is protected by a
40 Amp fuse located in cavity 5.
Circuit G6 connects from the message center through the Body Control Module (BCM) to the oil pressure switch. The engine oil pressure switch
is a case grounded switch that is normally OPEN with the oil pressure above a pre-determined level.
If the oil pressure is below that level, the switch CLOSES and completes a path to ground, illuminating the lamp.
