Fuel Gauge

The instrument cluster is hardwired to the fuel sending unit, which is a variable resistor controlled by the action of a float arm. When the fuel level is low, resistance in the unit is low (15 ohms +/- 1 ohm). When the fuel level is high, the resistance is high (160 ohms +/- 2 ohms). The instrument cluster monitors the input from the fuel sending unit and commands the fuel gauge indication according to the fuel level data.