Dakota 2WD V6-239 3.9L Magnum (1996)
Temperature Gauge: Description and Operation
CIRCUIT 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.
As current flows through the coils in the gauge, it creates a magnetic field. One of the coils in the gauge receives fixed current. The other coil is
connected to the temperature gauge on circuit G20. A change in temperature changes the resistance in the sensor, which alters the current flow
through the second coil in the gauge. A change in current flow alters the magnetic field in the gauge, which changes the pointer position.
