Hey turbo eco-
Well I can't speak for the 91's, but back in 81 there were only 2 items that took a 30 amp fuse. One was for the fuel pump relay (gas models, not really applicable on this forum
) and the other was for the radiator fan motor. At least on the 81's (westmoreland), this radiator fan motor fuse occupied the #1 fuse location, and I would guess that might be the case with yours. Hopefully you replaced it, if not keep an eye on your temp gauge.
Hope this helps.