Anyone who wants to use a car with a trailer these days must ensure that the electrical basic signals of the car are reliably transmitted to the trailer. Trailer connectors fulfill this function. In principle, there is a choice between the 7-pin connector according to ISO 1724 or the more modern, 13-pin connection system according to ISO 11446.
Affordable 7-pin connectors have long been tried and tested and are still in use today. However, in some cases, an adapter to the 13-pin standard is necessary – for example, for connecting a 7-pin trailer to a new vehicle or for transmitting all legally required signals to certain trailers. In addition, they are only permitted for trailers up to 750 kg.
The 13-pin connector, on the other hand, corresponds to the latest international state of the art. It is suitable for many types of trailers weighing more than 750 kg and meets the latest requirements of the German Road Vehicle Registration Regulations (StVZO) by transmitting more electrical signals. As a waterproof interface, it ensures that the sensitive electronics remain dry.
In this white paper, you will find further details on both connection systems, especially for standardization, the application areas, technical data and legal requirements.