Simple Two Light Wiring Diagram Trailer. Yellow left turn signal left brake light. Trailer light wiring diagram uk download the trailer light wiring diagram uk that is available on this post.
The second wire green to originate from the connector is responsible for the right signal. Trailer light wiring diagram uk download the trailer light wiring diagram uk that is available on this post. Four wire trailer light connectors the typical type of connection used for pulling small to medium boat trailers and small utility trailers.
The third brown wire is the one that is responsible for the taillights.
Below we have the wiring diagrams for both a 7 and 13 pin connector. It is a modern way of wiring which reduces breaks in the cable and makes the work much easier and faster. Trailer service checked trailer said the lights all worked in the shop both with testing and connecting to another truck. 3 wire automotive system the three wire system is the most common automotive electrical system.