13 to 7 Pin Trailer Plug Adapter – 12V Waterproof Towbar Socket

Convert Your 13-Pin Car Socket to a 7-Pin Trailer Plug — Safely & Securely

Keep your trailer lights and signals working perfectly with this 13-pin to 7-pin trailer plug adapter. Designed to European standards, this waterproof towbar connector bridges your vehicle's 13-pin socket to a standard 7-pin female socket — no cutting, no rewiring, just plug in and go.

Made in Mainland China.

Whether you're towing a caravan, a horse trailer, or a utility trailer, this adapter ensures a reliable transfer of all electronic light signals — including indicators, brake lights, fog lamps, and tail lights — from your vehicle to your trailer.

Key Features

• Universal European Standard Compatibility — Fits cars with a 13-pin towbar socket and trailers with a 7-pin connection
• Weatherproof Sprung Locking Flap — Protects connections when not in use and firmly locks the 7-pin plug when in use
• Full Signal Transfer — Transmits direction indicators, brake lights, fog lamps, tail lights, and number plate lamps
• 12V Compatible — Works with standard 12V vehicle electrical systems
• Durable & Secure — Built to withstand outdoor and road conditions

Pin Wiring Guide

7-Pin Connections (12N Black Cable)

• Pin 1 – Yellow Wire: Left/H 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 & Number Plate Lamp
• Pin 6 – Red Wire: Brake Lights
• Pin 7 – Black Wire: Left/H Tail & Number Plate Lamp

13-Pin Connections

• Pin 1 – Yellow Wire: Left Indicator
• Pin 2 – Blue Wire: Fog Light
• Pin 3 – White Wire: Earth Return
• Pin 4 – Green Wire: Right Indicator
• Pin 5 – Brown Wire: Right Tail / Side Light
• Pin 6 – Red Wire: Brake / Stop Lights
• Pin 7 – Black Wire: Left Tail / Side Light
• Pin 8 – Pink Wire: Reversing Light
• Pin 9 – Orange Wire: 12V Permanent Power from Battery
• Pin 10 – Grey Wire: 12V Ignition On (Battery Charging / Fridge)
• Pin 11 – White/Black Wire: Earth for Terminal 10
• Pin 12 – White/Blue Wire: Not Usually Used
• Pin 13 – White/Red Wire: Earth for Terminal 9

Who Is This For?

This adapter is perfect for caravan owners, horse trailer users, boat trailer towers, and anyone who needs to connect a 7-pin trailer to a modern 13-pin towbar-equipped vehicle. It's an essential bit of kit to keep in your tow vehicle at all times.

Related Products You May Need

• 10-Pack 22AWG Glass Tube Fuse Holder 5x20mm & 6x30mm Screw — Keep your trailer circuit protected with the right fuses
• 120ml Heavy-Duty Metal Rust Remover & Anti-Rust Spray — Protect your towbar and metal connections from rust

For more guidance on safe trailer towing and lighting requirements, visit the U.S. Consumer Product Safety Commission (CPSC) for general vehicle accessory safety standards.

Learn more: Tow hitch

Frequently Asked Questions

Q: Will this 13 to 7 pin trailer adapter work with my European-spec vehicle?

A: Yes! This adapter is specifically designed for European standard trailer connections. It converts your car's 13-pin towbar socket to a 7-pin female socket, making it compatible with the vast majority of caravans, horse trailers, and utility trailers that use the standard 7-pin plug.

Q: Is this trailer connector waterproof?

A: Yes. The adapter features a weatherproof sprung locking flap that covers and protects the connections when the 7-pin plug is not in use. When a 7-pin plug is inserted, the flap locks it firmly in place, preventing moisture, dust, and road debris from affecting the connection.

Q: Does this adapter support brake lights and indicators?

A: Absolutely. This 13-to-7 pin adapter transfers all key electronic signals including left and right direction indicators, brake/stop lights, rear fog lamps, tail lights, and number plate lamps — ensuring your trailer is fully road-legal and visible to other drivers.

Q: What voltage is this trailer plug adapter rated for?

A: This adapter is designed for standard 12V vehicle electrical systems, which is the universal voltage for cars, trucks, and tow vehicles equipped with a towbar socket.