Towbar Wiring Types

7 Pin wiring is usually the most common wiring type found on older trailers and bike racks. This socket provides:

• Side Lights
• Brake Lights
• Left and Right Indicators
• Rear Fog Lights

13 Pin wiring is the go-to wiring for almost all new caravans, trailers and bike racks, as it provides all the features of twin 7S and 7N wiring in one socket. This socket provides

• Side Lights
• Brake Lights
• Left and Right Indicators
• Fog Lights
• Reverse Lights
• 12 volt permanent power feed
• 12 volt switched power feed

👉 Further reading: 7 pin vs 13 pin towbar electrics guide

Twin Wiring 7S and 7N is typically found on older caravans and provides

• Side Lights
• Brake Lights
• Left and Right Indicators
• Fog Lights
• Reverse Lights
• 12 volt permanent power feed
• 12 volt switched power feed

👉 Further reading: Simple towbar guide.

👉 Further reading: Does my towbar need coding?