OK. Reporting back. I was at a loss as to why the truck would not start. Not even attempt to start. Nothing. I went to the starter relay and checked all good. I looked at the wiring which I knew was good and under the truck it was nice and clean. Nothing on the floor or any mice chewing's. I had charged the batteries all day yesterday and they were good last night. I did not load test them. But this AM I had the rear battery stone dead. Nothing. December 2016 battery sitting in the cold / hot barn. I guess that will do it. No worries. It started right up after I replaced the rear battery. I will meet my goal. It makes me Happy.