Adding Interior Lights To Enclosed Trailer. Does your trailer have a battery for the break away on the elecric brakes. To do this you would tap into the brown wire on the trailer harness.
On my 7x14 CarMate enclosed cargo trailer with interior lights the trailer wiring must be plugged into the truck and the truck lights must be on. Maybe you can tap in to a power source there. The best way to power the interior lights in your trailer is with its own independent battery.
Adding a Battery and Wiring to a Non-Powered Trailer.
Thanks I used some Optronics LED utility lights clear flange mount. You should not need the isolator if you are connecting the B Charge lead of the 7-pin plug to the trailer battery. Not too long ago some one suggested using lights that run off of AA batteries touch them they are on touch them they are off hope this helps some. 46 out of 5 stars.