Oil Pressure Gauge: Description and Operation

When the ignition is in ON (II) or START (III), battery voltage is supplied through fuse 5 to the gauges in the gauge assembly.

The engine oil pressure gauge is operated by two intersecting coils wound around a permanent magnet rotor. When voltage is applied to the coils, a magnetic field is generated. The magnetic field causes the rotor to rotate and the gauge needle to move. The magnetic fields are controlled by the engine oil pressure gauge sending unit. As the resistance in the sender varies, current through the gauge coils changes. The gauge needle moves according to the changing magnetic field.