On Wednesday, my AC stopped working on my 94 Trooper on the way back from lunch. It's been working fine with no loss of cool all season, and never had a problem in the 2.5 years I've had the truck.

I checked the fuse and it was blown so I replaced it the next day. AC worked normally from the Auto parts store to the next stop, about 10 minutes or so, but blew almost immediately when I set out again.

I religiously shut off the AC a minute or so before I stop, and never start the truck with the AC on.

What should I look at next?

Thanks,
Joe