Blown Ignition fuse

Hi, I was driving down the road in my 91 explorer while it was raining. I hit a bump and then it died. I turned the key and it nothing happened. No fuel pump, starter anything, vehicle still has power, except window's, radio and it starting. I looked at my fuses under the hood and the 60amp ignition fuse was blown. I put in a 40amp because it was the only one i had, and it blew the fuse as soon as i turned the key. I went threw two more fuses before i stopped. I am guessing that it is a shorted out wire somewhere but i don't even know where to start looking. If anyone has any idea's i would greatly appreciate them. Thanks for the help