Hello, have changed my train and now a 7 pole can. the problem is now, my fridge is no longer on 12 volts during the ride. I once opened the can, it is all occupied. what can I do there? oh yes on the caravan is a 13 pole on it, have now an adapter for, from 7 to 13. hope that one has a tip, does not want to drive with gas. greeting blues