Get the wiring diagrams, and try some differential diagnosis;
If the effect on the fuse is the same with all the windows, then look for a short around a wire which is common to all the windows, but probably between the fuse and the window switches. Has anybody done any installations or mods under the dash--radio, cd changer hookup, adding fog lights, etc? If so, look in the physical area where one of the wires might have been compromised.
If the problem is really only with one, or less than all, the windows, look closer to the window switch and window motor. Has somebody replaced any of the speakers in the doors and disturbed the window wiring?
Let us know what you find.
Good luck
--
We have met the enemy and they is us. Pogo '99 S70 cop car : T Roosevelt Rough Rider tires& suspension, Walmart fog/driving lights, speakers by ebay, 2 old Volvo amps cranking out 8x20 W, ambiance by Pall Mall, trim by Le Duc d'Tape