* Blown fuse: Check your owner's manual for the fuel pump fuse location and check if it's blown.
* Relay failure: The fuel pump relay might be faulty. Again, consult your owner's manual for location.
* Fuel pump itself: The pump might be failing or has failed. This requires professional diagnosis and replacement.
* Wiring issues: A problem in the wiring leading to the fuel pump could prevent it from working.
* Inertial switch (crash sensor): Some vehicles have an inertia switch that cuts power to the fuel pump in a collision. Check your owner's manual for its location and reset it if necessary (it's usually a simple push-button reset).
If you're having fuel pump issues, you need to diagnose the problem. It's best to consult a repair manual specific to your 1994 Ford Thunderbird or take it to a qualified mechanic.