Single Electrics, also known as 12(N), are fitted as standard. They provide power from the towbar to the lights on a trailer or caravan.
If you’re only going to be towing a trailer this is all you need. You can tow a caravan using only single electrics, but the interior functions of the caravan, such as the fridge, wouldn’t have power to them.
Twin Electrics, or 12(S), are fitted in addidtion to single electrics if you’re going to use your towbar for towing a caravan built prior to 2008.
The extra grey socket provides power to operate the interior functions of the caravan such as the interior lights, run the fridge and charge the battery while you are towing.
13 pin Electrics have been standard in most other European countries for some time.This is replacing the 2 separate socket currently used in the UK. The 13 pin socket is essentially the two 7 pin sockets merged in to one.
All caravans manufactured in the UK from 2008 are fitted with an ISO 13 pin connector as standard. This system uses one socket with 13 pins inside, instead of the traditional two separate 7 pin sockets.
1. Left Indicator (Yellow)
2. Fog Light (Blue)
3. Earth (White)
4. Right Indicator (Green)
5. Right Side Light (Brown)
6. Brake Light (Red)
7. Left Side Light (Grey)
1. Reverse Light (Yellow)
2. Battery Charging (Blue)
3. Earth (White)
4. Permanent Live Feed (Green)
5. Spare (Brown)
6. Fridge, Ignition Live (Red)
7. Earth for Fridge (Grey)
1. Left Indicator (Yellow)
2. Fog Light (Blue)
3. Earth (White)
4. Right Indicator (Green)
5. Right Side Light (Brown)
6. Brake Light (Red)
7. Left Side Light (Black)
8. Reverse Light (Pink)
9. Permanent Live Feed (Orange)
10. Switched 12V (Grey)
11. Earth For Switched Power (Black/White)
12. Spare (Light Grey)
13. Earth For 12V Power (Pin 9) (Red/White)