Blowing main 20a fuse

I keep blowing the main 20 amp fuse, I know this is not much info, but is there anything common I should look for before i start? KZ305

mine was doing the same thing and it turned out to be a bare wire going out of the fuse box to supply power to my lights and switches. mines a 1000 and its got tons of wires that were but connected, wraped with tape and then zip tied. under one of those globs of connections was a bare wire that went right to the frame. went through all connections with time and patience and after i was done no more blowing fuses yippie. hope this helps.

disconect the fuses from your accesory circuits and see if it blows fuse,if not put in one fuse at a time till it pops then follow the wiring in that circuit till you find the problem

Thanks for the help!