Trailer Wiring Diagram - ventertrailers Trailer Wiring Diagram. Trailer Wiring Diagram WIRING DIAGRAM TAILGATE ( TRAILER) - overland PDF fileWIRING DIAGRAM TRAILER _ sabs 7core Author: Anton Diedericks Created Date: 3/2/2005 12:01:08 PM How to Wire Lights on a Trailer | Wiring Diagrams Trailer Wiring Diagram. To connect the electric system of your trailer to the vehicle, you will be using special connector. Above we have describes the main types of trailer wiring diagrams. Below is the generic schematic of how the wiring goes. 4 pin trailer wiring diagram.5/5(2) Trailer wiring - 4x4 Community Forum My Landcruiser Xplore caravan and any other trailer I have towed I merely plug in and all the lights work. I bought a boat and the trailer lights are busy driving me batty. I am not a technical guy, but opened the socket and noticed that it has 5 wires and not 7 My problem is that when I press the brack the indicators also burn. I am not sure what I am doing wrong. Sticker- Trailer Plug wiring diagram - 4x4 Direct Sticker- Trailer Plug wiring diagram. Reference ST-TRAILERPLUG. Rating . Sticker forTrailer Plug wiring diagram. R15. ZA Stickers are compulsory when visiting neighboring countries. You need one ZA sticker on the back of your vehicle and one on the trailer / caravan.