No Power to 7-Way Plug?

I may have been a bit misleading. So It is an isolation switch that you install usually on you firewall and beef it up with a bigger charge wire than stock. It is powered directly from the truck batteries. When you turn on the truck, the isolator opens the flow of power. When you turn it off, obviously it closes the flow of power beteen the truck and RV. The reason I set up my 2 sytems was first, I could deliver more power to the TC. Again running dual batteries in the truck and the TC. So I used the stock bummper 7 pin to plug in my boat so I could keep some power going to the boat batteries...just redundicy and peace of mind. That bumper connection is also isolated but just not as powerful. ....HEY! congrats you are getting a good education.