Fuel Gauge: Description and Operation

The fuel-level gauge is connected to the fuel pump module on the G4 circuit. The fuel pump module contains the fuel pump and the variable resistor for the gauge. Grounding for the fuel gauge is provided on the Z2 circuit, which terminates at the left rear wheel house.

The fuel gauge contains a pair of coils and an indicator needle. As current flows through the coils in the fuel gauge, it creates a magnetic field in the gauge. The magnetic field controls the position of the fuel gauge pointer.

The fuel-level sensor contains a variable resistor. As the position of the float arm on the level sensor changes, the resistor changes the current flow through the fuel gauge circuit. A change in current flow alters the magnetic field in the fuel gauge, which changes the pointer position.