Gauge cluster

SOURCE: fuel guage quit

the sender unit in the fuel tank has given up the ghost ,replace unit

SOURCE: 1966 Ford Mustang Gas Guage not working

I had a similar problem. In my 1966 Mustang gas tank, the fuel pick-up was on a "float." My float developed a hole, filled with gasoline, and sank to the bottom of the tank, therefore, the gauge always read empty, but the car ran well. All the other gauges of course worked correctly. The repair was a relatively simple soldering job (after removing the float from the tank), but if that is indeed the problem, ensure all the gasoline is drained from the float before beginning the soldering job.

SOURCE: Fuel gauge not working

Normally I'd say the float/sending unit in the gas tank is the culprit, however the fact that your service engine light is involved requires further investigation, You need to hook up an obd2 reader to the interface mounted under your dashboard and see what it has to say, there might be a simple error code preventing your gauge from functioning. Many auto parts stores will do this for you for free...

SOURCE: Instrument cluster not showing odometer and

It could be the voltage regulator for your instrument cluster is the problem.

SOURCE: The fuel gauge doesn't work on my 95 F250

the sending unit could not have power or the fuse could be burnt out. Sometimes the sending unit does get stuck.