EU 12V 7 Pin Plastic Trailer Plug Socket Wiring Connector Adapter for Caravan Towbar Towing

7 pin trailer plug, which comes in flat or round. Usually the big is used on trucks or heavy machinery. These vehicles have a lot more lights and require more power to be fed through the plug. The seven pin connects all of the things that we mention with the five pin, plus reverse lights, and an electronic brake controller. We prefer using the flat over the round because in our experience, the wiring is more likely to get damaged in the round.

Also, you can plug a seven pin flat into a twelve pin flat, making it more versatile. On the tow vehicle, our preference is to mount a twelve pin flat. If you tow a trailer or caravan that has either a seven pin flat or twelve pin flat, both of these can plug into the twelve pin on your car.

7 Pin Lighting Connections – 12 N Black Cable Function

PIN 1 – Yellow Wire (Left/Hand Direction Indicator)

PIN 2 – Blue Wire ( Rear Fog Lamps)

PIN 3 – White Wire ( Earth Return)

PIN 4 – Green Wire (Right/H Direction Indicator)

PIN 5 – Brown Wire (Right/H Tail & No. Plate Lamp)

PIN 6 – Red Wire (Stop Lamp)

PIN 7 – Black Wire (Left/H Tail & No. Plate Lamp)

Caravan 7 pin supplementary circuits 12S grey cable function

Pin 1- Yellow Reversing Lamps

Pin 2- Blue Battery Charging (original UK system)

Pin 3 -White Earth Return (for pins 2&4)

Pin 4- Green Power Supply

Pin 5 -Brown Spare

Pin 6- Red Fridge

Pin 7- Black Earth Return (for pin 6)