Temperature Gauge: Description and Operation

Circuit Description
When the ignition switch is in the ON or START position, battery voltage is applied to the gauges (speedometer, tachometer, fuel gauge and engine coolant temperature gauge) from fuse 28.

Engine Coolant Temperature Gauge
The pointer of the engine coolant temperature gauge is moved by the magnetic field of two coils. The coils are at right angles to each other. The magnetic fields controlled by the engine coolant temperature sender cause the gauge needle to move. As the resistance in the sender varies, current through the gauge coils changes.