Blown Fuse.

I have a 2001 grizzly 600 that keeps blowing the 20 amp fuse. I read where I need to trace the lines to see if there is a wire messed up. I was wondering what would be the best way to go about that? Like take off the body or what would be a good start?
Also the fuse did not blow until I changed my front and rear tires. I got it home and it wouldn’t start then I found the blown fuse.