Fuel Gauge: Description and Operation

Voltage from the electronic instrument panel is applied to the fuel tank unit.

The resistance of the fuel sender changes with the amount of fuel in the tank. With a full tank the resistance is about 90 ohms, and with an empty tank the resistance is less than 1 ohm.

The information processor is programmed to account for battery voltage changes. Therefor, changes in battery voltage do not affect the fuel gauge reading.