Randomly blowing fuses

I just drove my 1987 toyota 4WD van 200 miles today, and blew 3 different fuses on the trip. First was the dash lights, then the break light fuse, and finally the EFI fuse. I can't really figure out what the connection could be. Maybe the voltage regulator is bad? If it was a short, would it effect different circuits?

I figured it out. It was raining on the drive a bit, and it looks like my windshield seal isn't sealing. A little water was leaking on the fuse block.