Glad you found it!
I had my Coach Battery Disconnect Solenoid open up just minutes before taking off for our trip last month. Just after bypassing the solenoid (as previous members have posted, bolted the high current DC wires together from each side of the solenoid. The key here is to make sure you're on the right solenoid!) I found a wire that had burnt open in the latch circuit. It wasn't easy to see until I removed the high current DC wire.
Dan and PJ Cruising With Maggie, Scarlett & Rhett
2005 Coachmen Sportscoach Elite 40'
350HP C7 CAT