Oil Pressure Gauge

The oil pressure gauge displays the engine oil pressure. The pointer of the gauge is moved by 2 coils. The oil pressure gauge is similar to that of the fuel gauge.

The oil sensor/switch is connected to the junction of the 2 coils. The sensor has low resistance when the oil pressure is low and 90 ohms resistance when the pressure is high. This changing resistance changes the current flow through the coils. The coil's magnetic fields move the pointer from high to low.