Trailer Air Junction Box

In this video we explain 7way trailer junction box Also see out blog post on this at. Helps you troubleshoot trailer wiring issues and test lights and brakes If you are always working on trailers you know how hard it. This is a basic wiring diagram for a seven pin trailer configuration.

Trailer Wiring Junction Box Installation This is a must when buying an old trailer takes no time and will save you lots of headaches. Items used- Wire loom. This trailer brake and light tester was inspired by Scottthesigncrafter and the video he created for a similar build After servicing.

7pin with junction box.