We have a 2010 Montana mod. 3075RL that has developed a 12Volt power loss that I think I'm just going to have to trace, but here goes. On the line that comes out of the 12V fuse box that's marked kitchen are the interior lights that come on when the door is opened, a single bulb 12V light that is over the counter, the 12V supply to the refrigerator, the single light & refrigerator are in the slide, The 15amp fuse is good, & the lights come on when the door is opened, the single light & refrigerator are without 12V power. Been trying to follow the wires but that has been difficult.
JOHN