How To Find the 12 volt system on a refrigerator?

[ajwilson1953]

I have a 2008 Roadtrek 210 Popular that has a three way fridge but it won’t work on 12 volt. It only works on the road with LP. Anybody have any ideas as to where I should look for the problem. Fuse, relay, I have no idea where to begin and I don’t live close to a service center. About 8 hours away.

 

[Rollin Ollen]

Back when we had a three way fridge it didn't word worth a darn on 12V anyway. We relied on LP when traveling any kind of distance. If our drive was only one or two hours away, we just turned it off and it kept things cool until we hit our destination.