Good Sam Community

89 pace arrow jd chassis. No power to coach unless on shore power. Not driving , nothing. How should the battery switch relay test

89 pace arrow how do I switch to coach batteries in the boonies. I have no information on this at all. Please help. 89 death star John deer chassis

My two coach batteries are dead. They are not 6 v but two marine 12 v . Are two 6v better then 2 12v? I understand series and parallel wiring. I just need to know what type of batteries are best, the 6v or 12v. Group and size would be helpful