Well no replies so call the manufacture and very little help. But was told that this unit uses 12 volt power from the charge line on the trailer connector. Well blue line was not connected and didn't have battery charge line. I looked all over and no wire or relay. Since they don't use the blue wire and it was there so I ran it to the right post but installed a jumper to the charge pin. Then up front I had the factory harness for brakes and used it for the relay and resettable fuse then hooked wire to fuse panel switch power. So when key is off no drain of power on battery.
And it works like a charm. Why they didn't wire this for charge battery wire. Next time I will install a wired system.
Sent from my iPhone using iRV2 - RV Forum