[thebigbadWOLF]

ya that's true but i meant what is the problem for the fuse to blow

fuse will blow when more then the specified current is pushed through to it.

be lucky your fuse is poping and not dmging anything else thats not 0.05$ to replace.

however you could have a short circut, bad ground,bad wire ect....

this is going to be a PIA!!!

start checking EVERY wire you can see.