si_d_2003

Hi this is my first post, just bought a rx-8 and think it was the biggest mistake but anyway my most recent and serious problem with it is the A/C fuse has blown in the passenger footwell. I was using my air con and i turned it off and then come to turn it back on and it wouldnt, and i noticed that there were no blowers or heater control or anything not even the lights on the switches work. So after finding the fuse i think this cicuit is for everything but when i replace the fuse it pops as soon as the ignition is turned on. I have tried tracing the wires back to look for a short but there is too much crap. Has anyone come across this problem or if not could someone please help me out with a wiring diagram for the aircon. Diagnostic machine hasnt brought any fault codes up and ive checked the relays under the bonnet.
Please help an new RX-8 owner.