Time for a new power converter.
I have a Parallax 7345 converter in my 2004 5th wheel. The PO decided that since it wasn't charging the batteries, the best thing to do was put a battery charger on them. I am looking at a PD4600 seri...
Forum Discussion
Sounds like you know what you are doing. . Using chassis as negative is a fairly common practice. In fact there is one reason for NOT running a separate negative wire but I do not think it applies to you. Does to me though (I sometimes press a button that puts 100 Watts RF into a wire 50=90 feet long and well ground loops (Multiple paths to groudn) can be an issue when you do that... But you don't do that)
