Join Date: Nov 2002
Location: SouthEastern PA
Definitely, take off the instrument bezel and make sure the gauge isn't stuck. If it isn't, but it still doesn't work, then swap the fuel gauge out. Believe me, it will be far cheaper and easier than trying the sending unit first. If none of that helps, check the wiring and the plug at the sending unit (if you can see it with the tank in). If nothing else helps, you will have to drop the tank and check the sending unit. (BIG PAIN)
My 89 had a bad fuel gauge. A new gauge fixed the problem, no sweat.
Owner, 1990 Thunderbird SC, white w/ gray cloth