'88 Cherokee radio problem

My problem with my radio is it's blowing the fuse on the back of the radio. So it looks like I'm going to need a schematic to find the part that is causing that fuse to blow. It's the internal wiring diagram that I need, so if you have that info or know anyone that does, I'll appreciate getting the schematic a whole lot.

TIA,

Bob

This is the best I copuld come up with.

http://img92.exs.cx/img92/6905/scan1.gif

lol.... OK, I wasn't expecting that!

Are u staying with the stock radio why not buy a new one much much easer