I have a 98 Chevy Blazer that keeps blowing the Crank fuse and wont start. I have had it at the shop they have changed the starter, Safety neutral switch and it ran fine for a month now it wont start again and the fuse is blown. I took it to the dealer who said it may be a loose wire shorting out. I was thinking it might be the ignition switch but not sure. I would hate to have the dealer do it if that is what it is. Any help would be appreciated.