Wiring Diagram for 13 pin euro plug

Wiring 13 pin euro trailer plug & sockets

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The 13 Pin Euro trailer plug is used for supplying all trailer or caravan lighting including reverse and gives auxiliary power to other systems such as fridges, internal lights and charging systems.

This replaced N and S type 7 pin sockets used on trailers and caravans in the UK and Europe.

To view our range of 13 Pin Euro Plugs, Sockets, Extensions & Convertors: CLICK HERE

The 13 Pin Euro plug has been used on Caravans since 2008.

Due to new laws, any newly manufactured 02 class trailer are now required to have a Reverse Light.

13 Pin Plugs do have a reverse light facility, whereas a 7 Pin plug does not.

Many major manufactures have been fitting reverse lights and 13 pin plugs on O2 trailers for a few months before this date.

For this plug to work effectively, we advise using a vehicle specific wiring loom
or a 7 way Universal Bypass Relay and a Split-Charge Relay

Converters are available to allow you to convert 7 pin plugs to 13 pin or 13 pin to 7 pin.

The 7 pin ‘N’ type (12N) plug will still be used on O1 trailers and many Towbar fitters will still offer the 7 pin Socket as the cheapest alternative.

Wiring Diagram for a 13pin Euro trailer plug.

Below is a diagram of a 13 Pin Euro trailer plug with coloured pins as they are wired.

On the rear of the pins the numbers are marked in the plastic next to each pin.

The pins usually have a small screw to retain the wire on the back.

When assembling a plug always remember to slide any gromets and caps down the cables before you start to attach cables.

Which colour wire goes where in a trailer plug.

See table below showing the pin number in the 13 pin plug and the colour wire that should connect to the pin (shown in the diagram above) and then states the function.

13 Pin Euro Trailer Wiring Diagram
Pin No. Wire colour Trailer light Function
1 Yellow Left Indicator
2 Blue Fog light
3 White Earth
4 Green Right Indicator
5 Brown Right tail / side Light
6 Red Brake / Stop Light
7 Black Left tail / side Light
8 Pink Reversing Light
9 Orange 12v Permanent power for Battery
10 Grey 12v Ignition on Battery charging or Fridge
11 White/Black Earth for Terminal 10
12 White/Blue NOT usually used
13 White/Red Earth for Terminal 9