Trailer Board Wiring June 8, 2019 SOLVED: Wireing diagram for 7 pin plugin trailer board . wireing diagram for 7 pin plugin trailer board lights - Cars & Trucks question www.fixya.com Door Lock Wiring Diagram7 Pin Socket Wiring DiagramHow To Use Relay Switch In A Circuit7 Pin Trailer Socket WiringWiring Garden LightsHunter Fan Thermostat TroubleshootingLighted Switch Wiring DiagramTrailer Hitch Wiring Kit