Thanks to all. First, I will try holding down the circuit breaker button to turn it off and check the load. If that doesn't work I'll open the panel and disconnect a wire to the breaker. When we get to a location with a Sears I'm going to look for one of those DC amp meters.
This is a new problem that results in excessive drain over normal dry camping. We were doing fine for a week, the batteries were charging daily as we traveled and the drain by morning was nominal. Suddenly one morning the drain was excessive, so probably a short.
We have a 2013 Tiffin Allegro CA 32. The coach has both 12v and 120 V panels. Both are protected with circuit breakers. The chassis has its own panel which uses fuses.
