How to Replace a Fuel Gaugeby Michael Wallace
If the fuel gauge on your auto has stopped measuring fuel levels it is likely broken. A broken fuel gauge is not only annoying, it also can be particularly dangerous because you won't be able to tell when you are about to run out of gas. The good news is that if you have a little bit of extra time on your hands you can install a fuel gauge yourself.
Open the hood of your car and locate the back of the fuel gauge, behind the dash.
Unplug the two wires that run from the fuel tank and the battery to the back of the dash.
Remove the clear plastic panel covering the dashboard gauges according to the owner's manual of your particular automobile.
Insert the tip of a flat-head screwdriver in the seam where the gauge meets the dash.
Work your way around the gauge, prying outward with the screwdriver as you go. Continue until the gauge pops out of the dash compartment. Some models may have Phillips-head screws holding the gauge to the back of the panel. Check for these and remove if needed.
Fit a new gauge into the compartment and push it in until it is locked securely in place.
Replace the dash panel and plug the wires into the ports on the back of the new gauge.