Fuel Gauge

Circuit consists of an electromagnetic gauge in instrument panel and a fuel tank sending unit. Fuel gauge sending unit consists of a float attached to a contact arm and a rheostat. As the float level changes with fuel level, contact arm moves over rheostat which changes resistance to gauge circuit.

Gauge pointer moves in response to the magnetic field created by 2 coils in gauge located at right angles. Battery voltage is applied at the "E" coil. As the current leaves the circuit it is divided into 2 directions; one path goes to ground through the "F" coil and the other path goes to ground through the variable resister of the fuel gauge sending unit. Gauge pointer may set at any position when ignition is off and should move to correct fuel level with ignition switch in "ACC" or "ON" position.