I was mucking around near my alternator contacts and blew the main fuse that protects the ignition. It lives in the fuse box next to the battery (truck's an 86 4x4 w/ carb). It's a black square fuse with a clear window. So I'm trying to pull it straight out but it won't come out. There's a green and a red fuse next to it that look the same and pull straight out - no problem. How do I get this 80 amp out?- there's a tab- looks like a release tab and I stick a screw driver in but it still won't budge. Also, is this fuse available at the local Napa or is it dealer only?