Fuel Gauge Sender: Description and Operation

The fuel gauge receives the fuel level resistance from the fuel
level sensor, part of the fuel pump module. To prevent the fuel gauge
pointer from fluctuating as a result of excessive movement of fuel in
the fuel tank, the fuel indicator module provides a delay to the fuel gauge.If the fuel level is low, the resistance in the fuel level sensor will be low, causing the gauge to indicate empty (E). When the fuel level
is high, the resistance in the fuel level sensor is high, and the gauge indicates full (F). A new fuel gauge and the fuel indicator module must be installed together. The fuel indicator module also turns on the low fuel indicator when the fuel gauge shows approximately 1/4 of a tank of fuel
remaining or less.