Thanks guys for all of your help. I put my nose to the grindstone on this one. I actually bypassed the possitive cable by running a seperate 8 guage cable to the power converter in an effort to bypass any hidden ground shorts; no luck, still blew the fuse. I even took the unit out placed it on my bench and guess what... they blew, + to + and - to -
Reluctantly I drove the rig back to where I purchased it from and the technician said "oh yea, we get a bad batch of those from time to time". Changed it out under warranty repair and all works good now. The only reason I didn't go that route in the first place was that it is over three hours away. So I figured I would waste three days trying to save one
Anyway, thanks guys. You have enlightend me on other aspects of these devices as well.
But truth be told. Those fuses will blow for reasons other than what the manufacturer claims.