Originally Posted by mbtelguy
Hi again The sketch below is my understanding of the wiring in your trailer and why I suggested the ground could be coming from another source.
Thanks for the reply and nice diagram. It's difficult to see the wires where they disappear and I'll take a look next time the converter is out.
What it appears is there is a large wire from the converter directly to the battery. And there is a smaller wire (shorted to ground) that runs from the solar controller to the battery.
It appears the two wires come together at the battery.
Today, I finally replaced the wire between the solar controller and battery. Works good now!
I appreciate all the help and suggestions...