Stop reading, take the top cover off the fuse holder in your pic, pull out the bad fuse and put a good fuse in it's place.
There's nothing special about that fuse, it's just a 30 amp fuse that any auto parts store sells. You should trace the wires back to find out why it blew.
Buy more than one fuse, if you don't find the root cause it will blow again.
Last edited by JimLev; 10-21-2013 at 04:41 AM.