Sundance L4-135 22L SOHC VIN D TBI (1992) - Engine Lubrication - Oil Pressure Gauge
Oil Pressure Gauge: Description and Operation
The oil pressure indicating system consists of an instrument voltage regulator, electrical oil pressure gauge and a sending unit which are connected in
series. The sending unit consists of a diaphragm, contact and a variable resistor. As oil pressure increases or decreases, the diaphragm actuates the
contact on the variable resistor, in turn controlling current flow to the gauge. When oil pressure is low, the resistance of the variable resistor is high,
restricting current flow to the gauge, in turn indicating low oil pressure. As oil pressure increases, the resistance of the variable resistor is lowered,
increasing current flow to the gauge, resulting in an increased gauge reading.
