Originally Posted by pizzaguy

What 50 amp fuse blew? YOu've got to tell us what fuse is blowing, then we just look at what the fuse feeds to see what our issue is.
Also, the car looks awfully rough, if it sat a long time, it may be that rodents have chewed the insulation off a heavy cable (like the cable from battery to starter to alternator) and it's contacting ground - that would be kinda rough on an alternator.