how do i change the power train control module and location on 2001 Ford Taurus

MY car is tacking out the 30a fues for the pcm relay

Asked by for the 2001 Ford Taurus
PCM is the least likely suspect! More likely a shorted wire. Or water intrusion.
how can i check for a bad wire. with the pcm out it does not take out the 30a fuse.