No power to anything

Although it's not an A body, it's still mopar so I figured this question would fit nicely here. I just came home after a 3 month period overseas and my 99 dodge 2500 v10 is completely cold iron. So without hesitation, I tossed in a new battery and attempted to fire it up. Nothing. Took the alternator in to get tested and it checks out just fine. I then popped open the fuse box and everything looked intact and good to go. I swapped a couple compadable relays but, still no power. I even brought out the multimeter to check the cables for corrosion or fried wires. Practically got zero resistance on all negative and positive cables. Does anyone else have any idea on what this electrical gremlin could be? It's not really my area of expertise