I just replaced the House Battery in my motorhome and it does not appear to be working. Seemed simple enough to disconnect the old and then replace with the new....but as usual for me, it's never eas...
Before the depression, I did a lot of work on pleasure boat electrics. I found that as soon as there was more than one wire to a battery post, the chances of mis-connection skyrocketed. So, when ever I had the chance, I would re-work the system to be on cable to each post.
So, Look for the loose wire that you forgot to put on the stack.