ISO 1724

Machine-translated from the German article

The ISO standard ISO 1724 "Road vehicles – Connecting devices between towing and towed vehicles – 7-pole connector type 12 N (normal) for vehicles with 12 V nominal voltage" describes the technical specification for 7-pin plug connections for trailer sockets, as a component of towing hitches. To be distinguished from this are the currently common European 13-pin connector according to ISO 11446, and the white 7-pin trailer plugs according to ISO 3732 for providing additional contacts such as constant plus, switched plus and reversing lights. The plugs are to be connected according to a predefined numbering or according to the assigned function.