Originally Posted by Jmooney
How about reference to ground in the trailer. ( main ground lug to trailer frame , and ground wire back to power center )
The 7 pin cord that connects the trailer to TV has a ground wire that grounds to the 5th wheel hitch on trailer, that appears good.
I thought the ground wire from the converter to the frame might be bad, unfortunately the trailer has a sealed underbelly. I was able to open an access panel that was about two feet from the ground lug, it appears to be secure, (OK).
So to recap, with trailer battery connected, I have 12volts inside the cabin.
With battery disconnected, and 7 pin plug connected to tow vehicle, no 12 volts inside the cabin.
it appears the ground is good at the hitch end and at converter. I'll have to check the resistance on the +12v wire on the 7pin trailer plug to the converter.