RAM 1500 Van V6-239 3.9L Magnum (1995)
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. Circuit G5 connects to the instrument cluster 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.
