Have RV Questions? Ask an RV Mechanic Online.
Are you sure you are hooking them up correctly? Take a photo of the cables and attach it to your post using the paperclip icon and let me take a look.
Somebody has something wired up wrong I suspect and that is draining them or shorting them out. If you can get me a photo of the cables on the batteries I may be able to tell you what is wrong.
That shows that something is messed up or shorted out.
That is normal..........those sensors are always live and will drain batteries over a period of weeks.
Bookmark this and come right back to it again. I will also make a phone chat offer for you in case you think that would work better
I am attaching a simplified diagram link for you. Yours may have more than one lead INTO and OUT of the batteries, but the hookup between all of them is the same as this. https://tse1.mm.bing.net/th?id=OIP.Mebf9925cb6383681d3a4c70b51ead857H0&w=117&h=110&c=7&rs=1&qlt=90&pid=3.1&rm=2
Just checking back in to see if you were able to get this resolved or so you still need some additional input from me here?