Refrigerator Question/Discussion
My refrigerator in my 2010 Mountaineer has always been a pain: alternately freezing or randomly going into the 60's. I've tried many fixes, none have worked. But my freezer works just fine. Anyway . ....
Forum Discussion
Well, it is not a good plan. Chances are the 2 batteries are not matched in size, which they should be for best results, but even if they are you will be running them down at different rates. Then connecting them together to charge, so they are going to come back up at different rates too. It is not good to have such mismatched battery bank. My opinion anyway. But I do think your truck can do a fair job of charging while you drive. Not fully charging, which can take days to complete, but not useless either.
