Gas gauge quit working? Help

Forgot to mention, check the sender ground. Set your multimeter up for lowest resistance scale, and stab hold the probes together HARD. This will give you the shorted probes resistance, which on an accurate meter will be a few tenths of an ohm, showing the probes/ leads/ resistance. Now stab one probe hard into the actual sender metal, not the tank, and stab the other probe hard to get a BODY ground. Should be very close to the previous reading, close to zero