While I have a 2004 Damon Escaper and my 12v fuse panel is directly above my shore power breaker panel, I'm guessing yours is different (based on you're asking). It does seem reasonable, however, that your 12v fuses should be in somewhat the same area as your breaker panel. Also, to me, it seems odd that aisle lights and roof-top satellite dish would be on the same fuse.
As you may know, Damon made some wildly different versions. Maybe something above will spark a thought. I wish I could help more. When you find your gremlin, please post back so that someone in the future may be helped. We Damon guys have to stick together.
Edit added: Oops... I just reread your post. My assumption was that you were referring to the roof-top dish which is 12v. In fact, you were messing with the receiver... which should be 110v shore power. The aisle lights are 12 volt. So... I'm even more confused than I was. :(