RAM 1500 Van V6-239 3.9L Magnum (1995)
Oil Pressure Gauge: Description and Operation
The case grounded oil pressure sensor is a variable resistor and switch. The variable resistor in the sensor connects to the oil pressure gauge on circuit
G60. The switch in the sensor connects to the oil pressure warning lamp on circuit G6.
Circuit G5 connects to the instrument cluster and supplies battery voltage to oil pressure gauge. The gauge uses two coils. Current passing through the
coils creates a magnetic field. Position of the gauge pointer is controlled by the amount of current passing through the coils to ground at the sensor.
Circuit Z1 provides ground for the oil pressure gauge. Circuit Z1 terminates on the instrument panel above the headlamp switch.
