Adding Lights Inside Enclosed Trailer. Thanks I used some Optronics LED utility lights clear flange mount. I want to add more electrical components to make my visits to the track and camping grounds more comfortable.
The trailer plug 12 volt charge feed will not work unless the key in the truck is on to keep the truck battery isolated from the camper battery while its not running. 3rd if your trailer where to come off your truckyour going to need all the power that think has its not a very bigpowerful battery. You should not need the isolator if you are connecting the B Charge lead of the 7-pin plug to the trailer battery.
So you will kill the battery pretty quick.
They wont come on. The reason that your cabin light only goes on when your parking lights are on is because it is drawing power from the brown tail light power. Does a guy have to hook something else up to the trailers wiring harness. 5 Jun 6 2010.