The extra socket that is fitted to the car to provide the power needed for these additional items is known as a supplementary or 12s socket. Plug size is similar to an australian 10c coin.

13 Pin Trailer Plug To 7 Pin Car Socket Wiring Adapter Tr139
Car 7 pin socket wiring. One of the most complicated things to test on a car often seems to be the 7 pin trailer plug as it hosts 7 different electrical connections in one plugwire. Details about 12v 7 pin plastic trailer towing car plug socket wiring connector adapter. In some cases and more often in europe the trailer light will be connected using a 13 pin plug and socket. 12v 7 pin plastic trailer towing car plug socket wiring connector adapter. Like a t connector an original equipment wiring harness plugs into the uscar socket without any cutting splicing or soldering required and it provides a standard trailer wiring output such as a 4 way flat or 7 way rv blade. If you look at a socket or plug you should be able to see the pin lables 1 7.
This supplies power to the road lighting of your trailer or caravan. If you look at a socket or plug you should be able to see the pin lables 1 7. 7 way rv blade connector tester 7 pin trailer wiring circuit light tester. 3 pin trailer socket european standard 3 way truck. You will need twin electrics if you require more power than what a single 7 pin socket can provide on a pre 2008 manufactured uk caravan post 2008 uk caravans are fitted with 13 pin connectors. This has now been replaced by 13 pin euro plugs on all new caravans.
This is an extension of the 7 pin flat. All diagrams are as viewed from the cable side see example above. Twin electrics is a 2 plug system which combines the single 7 pin 12n electrics socket with a 12s electrics socket. Small 7 pin round qld identifying. The 7 pin flat plug will fit into a 12 pin flat socket and work perfectly. In some cases and more often in europe the trailer light will be connected using a 13 pin plug and socket.
The 7 pin n type plug and socket is still the most common connector for towing. Use this 7 pin trailer wiring diagram to properly wire your 7 pin trailer plug. You can identify the supplementary sockets by their grey or white caps. It is fitted near to the original socket and like the original one has a seven pin connection inside. But with the use of a simple multimeter with a blackred probe you can test this easily at home to determine if there is an electrical break within the plug. If you have a 13 pin socket fitted to your vehicle adaptors to plug in so you can use a normal 7 pin plug are available.
If you have a 13 pin socket fitted to your vehicle adaptors to plug in so you can use a normal 7 pin plug are available. Below is a diagram for the original plug and socket showing the functions of each pin.
Gallery of Car 7 Pin Socket Wiring

