I noticed that one of the negative battery cables is corroded at the terminal and back into the wire itself.
Should I try to clean it, or replace it?
If I remove it, should I turn off the disconnect switch for the house and coach batteries while I am working on it?
If I replace it, I will have to go to a welding shop?? and have them make up a replacement as it is only about 6 inches long. I might as well remove (one at a time) and clean the terminals on all the wires while I'm at it?
I have no experience with so many batteries in one place and need lots of advice!