Coach powerf switch wont turn off 2006 cross country

Ok guys, I found the relay and one of the two 5 amp fuses was bad. I replaced fuse and it blew again. I tried it again with same result. I am thinking it is a bad transfer relay which I can get for about 50 bucks. Any thoughts out there?
I guess I am lucky it failed with the power in the on position. For the time being I disconnected the neg. on the coach batteries.
Thank you,
Dan