etrailer 7 Way Trailer Wiring Upgrade Kit Installation May 11, 2016etrailer 7 Way Trailer Wiring Upgrade Kit Installation This is a 7-way trailer wiring upgrade kit. This is going to be great for taking care of from the vehicle to your junction box whether Related searches for 7 wire junction box diagram 7 wire trailer junction boxwiring a junction box videotruck wiring junction box7 way junction boxsemi trailer wiring junction box4 wire junction box wiringphone wire junction boxwire junction box code