In my 1999 Excella Classic the
12v for the AC unit comes from the breaker panel that is beneath the front window. The breakers have a reset button on the side that will be noticeably extended if tripped. I've had a couple breakers go bad, that I replaced myself. If you have to do this, disconnect shore power and battery cables.
I am pretty sure your trailer is the same. Look at the breaker layout in section G in your Owners Manual.
Inside the AC opening in the ceiling it is a blue wire with a white strip.
(from memory 3 years ago when I replaced the AC)
ps:
these are automotive breakers that can be purchased at most parts stores.
I bought mine at Out of Doors Mart
http://odmrv.com/catalog/index.php?m...roducts_id=706