There are two main parts to a fuel gauge: the sender and the gauge. The sender is a float that is in the car's gas tank. The sender tells the gauge how much fuel is left in the tank, and this information is displayed on ... More »

The fuel gauge measures the amount of fuel in the fuel tank. The vehicle operator reads the fuel gauge from left to right. When the gauge is on the far left the tank is near empty, and when the gauge is on the far right ... More »

Wire a fuel gauge by first disconnecting the old dysfunctional unit to replace it with a new one. Obtain 12-volt power from the fuse box using a standard wire, and connect it to the positive terminal of the fuel gauge. N... More »

A vehicle fuel level indicator uses two components: a sending unit in the fuel tank, which measures the level of liquid through electrical resistance, and a fuel gauge that displays that level on the vehicle dashboard. S... More »

Check the pressure of a vehicle's fuel pump by hooking a pressure gauge to the fitting of the fuel pump, having an assistant rev the engine and checking whether the pressure matches the vehicle's specifications. Eliminat... More »

To check electric fuel pump pressure in a Ford F150 pickup, test the engine with starter fluid, connect a fuel pressure gauge to the Schrader valve, have a helper crank the engine, and look at the reading on the gauge. T... More »

To reset the oil change light on a car, turn the vehicle's ignition on, and press the Reset stick or button usually located on the dashboard, under the hood or close to the fuel gauge or speedometer. Then, switch off the... More »