Extension cable solutions for trailers and electrical connections
Extension cable options are essential for extending the reach of your trailer's electrical system or providing reliable power where you need it most. Whether you require a power extension lead, electrical extension cord, trailer wiring extension, or a connector extension cable, these products ensure a secure and efficient power supply extension for various applications.
- ✔ Easy connection for trailers and vehicles
- ✔ Durable plastic construction for longevity
- ✔ Versatile options: 7-pin and 13-pin compatibility
- ✔ Flexible lengths to suit your specific needs
Find the perfect option and order now!
Frequently Asked Questions
7-pin plug (Type N, ISO 1724) — the older standard:
| Pin | Terminal | Colour according to DIN | Function |
|---|---|---|---|
| 1 | L | yellow | Left direction indicator |
| 2 | 54G | blue | Rear fog light |
| 3 | 31 | white | Ground |
| 4 | R | green | Right-hand direction indicator |
| 5 | 58R | brown | Right-hand rear light |
| 6 | 54 | red | Brake light |
| 7 | 58L | black | Left rear light and number plate light |
13-pin plug (ISO 11446) — current standard, with additional functions and separate earth connections:
| Pin | Colour according to DIN | Function |
|---|---|---|
| 1 | yellow | Left direction indicator |
| 2 | blue | Rear fog light |
| 2a | — | Switch for rear fog light on the vehicle |
| 3 | white | Earth (circuits 1–8) |
| 4 | green | Right-hand direction indicator |
| 5 | brown | Right-hand tail light, side marker light and number plate light |
| 6 | red | Brake light |
| 7 | black | Left tail light, side marker light and number plate light |
| 8 | orange | Reversing light |
| 9 | red, 2.5 mm² | Direct power supply (terminal 30) |
| 10 | black-red | Battery charging lead |
| 11 | green-brown | Earth for charging cable |
| 12 | — | not assigned |
| 13 | white, 2.5 mm² | Earth for circuit 9 |
The numbering stamped on the plug and socket is binding — for cable sets with different numbering, this applies rather than the wire colours.
Adapter: Converting from a 13-pin connector on the vehicle to a 7-pin connector on the trailer is straightforward. Conversely, only the basic functions will work — the reversing light, constant power supply and charging circuit are missing, as there are no corresponding wires in the 7-pin system. Disconnect the adapter when not in use, otherwise the contacts will corrode.
If the lighting fails, it is usually not the bulb that is faulty, but the connection to it. Check in the following order:
- Contacts in the plug and socket — corrosion is the most common cause. Clean, dry and apply contact cleaner.
- Earth — is the connection to the frame secure and rust-free? If several functions fail at the same time, the earth connection is almost always to blame.
- Cables on the drawbar — this is where cables most often chafe through, often directly behind the plug.
- Bulbs and lights — only once everything else has been checked.
Conversion to LED: Lights must have a valid approval mark. After conversion, the trailer monitoring system in the towing vehicle may no longer be able to detect the trailer because the current flow is too low — in which case a suitable control unit will help.
Spare parts: electrical components, plugs and cables, as well as lighting.
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Product Overview
Our extension cable range provides practical solutions for extending electrical connections between vehicles and trailers or other equipment. Each power extension lead is designed for easy installation and reliable performance, making them ideal for a wide array of towing and power supply extension needs. With both 7-pin and 13-pin options, these electrical extension cords are suitable for various wiring standards and configurations.
Key Features & Benefits
Manufactured from robust plastic materials, these connector extension cables are built to withstand frequent use and challenging environments. The secure plug and socket connections ensure stable power transfer, minimizing the risk of disconnections or power loss. Spiral cable variants offer added flexibility and compact storage, while straight cable models provide extended reach for larger setups. All products are designed with fully occupied pins, ensuring comprehensive electrical connectivity for lighting, signaling, and auxiliary functions.
Selection Guide
Choosing the right extension cable depends on your specific requirements. Consider whether a 7-pin or 13-pin configuration matches your trailer or vehicle system. Length options range from compact to extended, allowing you to select the ideal power supply extension for your setup. Spiral cables are perfect when flexibility and space-saving are priorities, while straight cables offer straightforward installation for longer distances. All connector extension cables are compatible with standard sockets and plugs, ensuring seamless integration.
Applications
These electrical extension cords are suitable for use with trailers, caravans, and other towable equipment requiring extended wiring. They are also ideal for temporary power supply extension in workshops, garages, or outdoor events. Whether you need a trailer wiring extension for lighting, brakes, or auxiliary power, these cables deliver reliable and safe performance. Their versatility makes them a valuable addition to any toolkit where dependable electrical connectivity is required.
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