No power to coach -1996 coachmen m19 Ford e250
So I am waiting for my coach battery to come in for my 1996 coachmen built on a Ford e250. I was doing a voltage test of a set of wires when I got a click and lost all power to my coach area. The coach was being powered by the alternator without a battery attached. I immediately went to the fuses in the electrical panel in the coach. No blow fuses, I checked the chassis fuse boxes, no blow fuses. The chassis power works fine and the engine turns over without issue. I changed out the 40amp circuit breaker that was near the location of the coach battery without any change. I am curious if anyone knows where I should be looking for another circuit breaker or fuse? I have power to the chassis but none to the coach.