How do you fix a fuel gauge stuck on full on a 1993 ford f150?

To fix a fuel gauge stuck on full in a 1993 Ford F-150, first check the fuel level sender in the fuel tank; it may be faulty or have a stuck float. Inspect the wiring and connections to ensure there are no shorts or corrosion affecting the gauge. If the sender is working properly, the issue might be with the gauge itself or the voltage regulator. Replacing the faulty component should resolve the issue.