Need some help, car won't start

Alight, I posted once before and got a little help but now that I've narrowed down the problem some more I need some new opinions. My PCM fuse keeps blowing. Everytime I put the car in run, it pops right away. I thought originally it was the CCRM after buying a Ford Wiring Manual because when we took that unit out, the fuse didn't blow. I had my friend grab me a new CCRM and we put it in and as soon as we did, fuse continued blowing. Any ideas where to look after the CCRM, I know ir runs from there into the ECU, and then from there under the dash. Let me know...