28/06/2016
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Caravan towing electrics explained

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Everyone knows that hooking up the caravan towbar electrics lead is a vital part of the hitching process, but what does the connection actually help with on the road?

There are two types of sockets that you'll find on caravans when it comes to towing electrics. Tourers manufactured before the 2009 model year were fitted with two seven-pin plugs – one black 12N plug and a grey 12S. Modern caravans, however, have the electrics consolidated into a more convenient 13-pin plug.

If you do have a tourer with the old seven-pin plugs then fear not as there are plenty of adapters available to convert between the old and new. Our advice if you get the option, plump for the contemporary 13-pin option every time.

 

What are they for?

 

Caravan towbar 13-pin electrics

Caravan 13-pin electrics (post 2009)

Pin number Function Wire size Wire colour
       
1 Left indicator 1.5mm Yellow
2 Rear fog lamp 1.5mm Blue
3 Earth 2.5mm White
4 Right indicator 1.5mm Green
5 Right tail lamp 1.5mm Brown
6 Brake lamp 1.5mm Red
7 Left tail lamp 1.5mm Black
8 Reverse lamp 1.5mm Pink
9 Permanent 2.5mm Orange
10 Switched supply (fridge) 2.5mm Grey
11 Earth pin for 10 2.5mm White/black
12 No current allocation    
13 Earth pin for 9 2.5mm White/red


 

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Caravan towbar 7-pin electrics

Caravan 12N 7-pin electrics (pre 2009)

Pin number Function Wire size Wire colour
       
1 Left indicator 1.5mm Yellow
2 Rear fog lamp 1.5mm Blue
3 Earth 2.5mm White
4 Right indicator 1.5mm Green
5 Right tail lamp 1.5mm Brown
6 Brake lamp 1.5mm Red
7 Left tail lamp 1.5mm Black

 

 

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