A multimeter will help you find if the wiring circuit is broken.
Wiring diagram of what circuit on the vehicle.
You can find a wiring schematic for the fuel pump circuit open wiring on a 1991 Town Car in do-it-yourself repair manuals. Haynes makes one of the most popular manuals.
You can find the circuit drawing on its ballast.
No current will flow though a circuit which is broken.
Circuit breakers can be found in any circuit breaker panel. New circuit breakers can be bought at any shop that sells parts for installing or repairing electrical wiring circuits.
You need to find the short circuit in the wiring.
It is called an open, incomplete, or broken circuit. Circuits might be opened intentionally (using a switch), or unintentionally (breaks in, or disconnected wiring).
You can find a wiring diagram at directtechs.com but the catch is you have to have an account set up through them like from car toys, best buy, or circuit city.
You can find the wiring diagram for the starting/charging circuit in a Haynes manual for this car. You can get one at any local parts store. You can also find wiring diagrams at www.the12volt.com
www.autozone.com has a full set of wiring diagrams for this vehicle and a lot of others.
There is no resetting it. Either your circuit won't close (could be due to a broken switch, broken or shorted wiring, a bad relay, etc.) or the window motor is toast.
A short circuit would blow a fuse. Most fuses are marked as to which circuit they protect. Now that you know which circuit is shorted you can examine the suspected circuit for problems like damaged/pinched wiring to ground.