Hello All- New member here and new pop-up owner of a 1997 Flagstaff Pop-up that I am currently restoring/renovating. The previous owner had no battery in the system and converted the trailer from 7-pin to 4-pin. I am now wanting to go back to 7 pin but noticed that the wires coming from the converter to what would be a battery (haven't purchased a battery yet) is only putting out 0.9V when plugged into shore power. The converter manual says it has an auto breaker reset so there is no fuse to check as far as I know. Because everything else seems to work fine my plan is to live with the defective converter, assuming you all agree it is defective. Here is my plan and a subsequent question about tow wiring... Plan-buy a low amperage (800ma) battery trickle charger and just plug that into one of the outlets so I can get a trickle charge to the battery when plugged into shore power. Would this not just bypass the issue and still give me an effective system or is there a problem with this theory? Question about 7-pin in my circumstance- Because the system is not putting out enough volts from my converter to the battery to charge when towing, would the 12v auxiliary, battery positive, and converter positive all come together on the same binding post for my trailer wire junction box so the battery and fridge can run off of my tow vehicle when driving? I worry that this would leave the 12v aux jack live when not in use but I am not educated here. My understanding then is the negative battery would ground to the frame, converter is already grounded, and 7-pin would ground to the frame, all independent of each other. Do I understand this correctly? Thank you all so much for any help you can provide.