Plug Connectors and Sockets for Car Trailers
Plug solutions are essential for secure and efficient electrical connections on car trailers and caravans. Whether you need a robust connector, a reliable socket, or a durable fitting, our range offers versatile couplers and terminals to suit every requirement.
- ✔ High-quality materials for long-lasting performance
- ✔ Easy installation with screw connections and grommets
- ✔ Compatible with both 7-pin and 13-pin systems
- ✔ Secure fit for optimal electrical contact
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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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3-pole plug according to DIN 9680 for car trailers / construction machinery / agricultural machinery
Produit en stock 
3,90 €
incl. 19 % VAT excl. shipping costs
Product Overview
Our selection of plug connectors, sockets, and fittings is designed to meet the diverse needs of car trailer and caravan owners. From 7-pin to 13-pin solutions, each coupler and terminal ensures a stable and secure electrical link for lighting, indicators, and other essential functions. The assortment includes both metal and plastic housings, as well as plug holders and testers, providing comprehensive options for every application.
Key Features & Benefits
Each plug, connector, and socket in this category is engineered for reliability and durability. High-grade materials such as robust plastics and corrosion-resistant metals guarantee a long service life, even under demanding conditions. Integrated rubber grommets and screw fittings simplify installation and ensure a tight, weather-resistant seal. The range supports both single and dual cable setups, enhancing flexibility for various trailer configurations.
Selection Guide
Choosing the right fitting or coupler depends on your trailer’s electrical requirements. For basic lighting needs, a 7-pin plug or socket is typically sufficient. For advanced features like reversing lights or additional circuits, a 13-pin connector is recommended. Plug holders are available in both metal and plastic to securely store terminals when not in use, while testers help verify proper functionality before hitting the road. Always consider the number of cables and preferred installation method for optimal compatibility.
Applications
These plug solutions are ideal for car trailers, caravans, and similar vehicles requiring a safe and dependable electrical connection. Whether replacing a worn terminal, upgrading to a new socket, or installing a plug holder for added convenience, these products ensure reliable performance in all conditions. Their versatility makes them suitable for both private and commercial use, supporting a wide range of trailer models and electrical systems.
Find the right option now and order online.
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