Trailer Light Diagram. This is currently the most popular plug used for towing as it does the lighting on most trailers and caravans. Below is a diagram for the original plug and socket showing the functions of each pin.
Yellow left turn signal left brake light. 01392 216336 shop at westerntowingcouk. The table below with the diagram explain the connections used on a 7 pin setup.
4 wire led trailer lights wiring diagram.
The first diagram is a simple set up of two brake lights two indicators and two side lights. Not all trailers are equipped with reverse lights yellow wire. Brown tail lights side markers and running lights see brown wire notes below 3. Here is the diagram for 7 pin connector.