Temperature Gauge: Description and Operation

Circuit G20 connects the engine coolant temperature gauge to the engine coolant temperature sensor. The sensor is a variable resistor and case grounded to the engine on all engines except the V-10.The V-10 engine coolant temperature sensor has an external ground. Circuit F14 connects to the instrument cluster left connector and supplies voltage for the gauge.

The gauge uses two coils. Current passing through the coils creates a magnetic field. Position of the gauge needle is controlled by the amount of current passing through the coils to ground at the sensor.