13PinStecker

A 13PinStecker, or 13-pin plug, is a multi-pin electrical connector used primarily in automotive towbar electrics in Europe. It is designed to connect a towing vehicle to a trailer or caravan, allowing multiple circuits for lighting and auxiliary power to be carried through a single coupling.

The 13-pin system exists in several physical formats. The most common are round and rectangular housings, with locking mechanisms to prevent accidental disconnection. Connectors are typically designed to be weatherproof and may be rated for outdoor use. Because the exact pinout can vary by manufacturer and standard, the specification for a given plug should be consulted to identify which pin carries which function.

Typical applications include vehicle lighting and signaling (tail lights, brake lights, indicators), reverse lights, and sometimes additional functions such as rear fog lights or auxiliary power for caravan features (for example battery charging or interior lighting). Some systems also support data or control signals in more advanced towing setups.

Compatibility and installation vary by region and vehicle. Although 13-pin connectors are common for caravans and motorhomes in Europe, not all vehicles are equipped with a 13-pin socket, and different standards can coexist. When installing or upgrading, it is important to verify the exact pinout, ensure a proper mating pair, and use appropriate sealing and mounting to prevent corrosion and moisture ingress. If necessary, adapters can be used to connect to alternative connector types.