7-Pin Trailer Extension Cable (3m & 5m) – Wiring Harness with Plug & Socket

This 7-pin trailer extension cable allows you to quickly extend or replace the electrical connection between your vehicle and trailer. The cable is fully wired and equipped on one end with a 7-pin male plug, and on the other end with a 7-pin female socket, which means no additional wiring work is needed – just plug it in and you’re ready to go. It comes in two length options – 3 meters or 5 meters, so you can choose the optimal length depending on the distance between your vehicle’s socket and the trailer’s plug.

Features and benefits:

• Standard 7-pin configuration: The cable supports all functions of a 12-volt trailer lighting system: left/right indicators, brake lights, tail/running lights, fog/reverse light (if present), and ground. All cores are color-coded according to the standard convention, which makes it easy to connect correctly or troubleshoot if necessary.
• High-quality connectors: The pre-attached connectors (socket and plug) are made from durable materials (impact-resistant plastic with metal contacts) that ensure a reliable electrical connection. The contact pins are corrosion-resistant, guaranteeing a steady signal to your trailer’s lights over time.
• Flexible insulation: The cable’s outer jacket is flexible even in cooler temperatures, which makes routing the cable easy and prevents cracking. It is resistant to UV rays and oils, meaning the cable won’t degrade quickly from sun exposure or contact with lubricants and road grime.
• 3m vs 5m – choose the right length:
  • The 3-meter cable is ideal for standard small trailers where the distance from the vehicle’s socket to the trailer’s plug is not very long. This covers most small utility trailers for cargo, construction materials, or small watercraft (jet skis).
  • The 5-meter cable provides extra reach and is suitable for situations where the towing vehicle’s hitch is farther from the trailer (e.g., vans, campers) or for longer trailers and caravans. With 5m, you can comfortably connect a caravan or a tandem-axle trailer where a longer lead is needed.
• Easy setup and use: Using the extension is straightforward – plug the male end of the cable into your vehicle’s trailer socket, and plug the female end into your trailer’s existing plug. No tools or special skills are required. If desired, you can secure the cable along the trailer or vehicle frame with clips to prevent dragging or snagging.
• Multi-purpose solution: This extension cable is handy in many scenarios – when your trailer’s original cable is damaged or frayed, when you temporarily need to connect to a trailer with a short lead (e.g., towing someone else’s trailer), or for setups like boat trailers where you often remove the entire light board when launching the boat. With the extension, you can quickly install and remove the lights as needed.

By using this universal cable, you ensure a stable electrical connection with minimal voltage drop across the length, thanks to quality copper conductors. Whether it’s for a cargo trailer, camper caravan, or boat trailer, having an extension cable of the proper length guarantees that all your lights will function correctly and comply with road safety regulations. This means safer towing for you and other road users, as well as convenience in setting up your trailer’s electronics.