![]() The standard ISO 1185 specifies the dimensions of, and contact allocation tests and requirements for, 7-pole connectors of type 24N for the electrical connection of towing and towed vehicles with 24 V nominal supply voltage, thus ensuring interchangeability. The same applies for towing a trailer which needs a power supply. My understanding is that while driving this will charge the trailer battery while driving. ![]() This does not cover the reversing and rear fog light so if one or both of these lights are mandatory, the driver has to use either a second 7-pin connector (ISO 3731) or a 15-pin connector ( ISO 12098). 1 Hi, There is a 12v charge connector in a 7-way trailer plug, in my trailer it connects directly to the main battery. Application of ISO 1185 Type NĬonnectors according to ISO 1185 can only be used for simple trailers because the 7 pins can only transfer the most basic lighting functions. Due to a different contact arrangement whithin the connectors, users can not accidentally plug a normal plug into a supplementary socket and vice versa. For a better recognizability, the "normal" system features a black housing for plug and socket while the housing of the supplementary system is white. The "S" stands for "supplemental" as Type S connectors transfer additional functionalities - for example steady plus for the power supply of a trailer. There is also a "Type S" for 7-pin 24V trailer connectors which is defined in the standard ISO 3731. The best products are right here on AliExpress. The standard has the addition "Type N" for "normal". The standard incorporates plugs, sockets and cables. This also includes signals for the trailer brake control. ![]() Its purpose is to transfer the lighting signals from the drivers cab to the trailer. The first version of the standard dates back to 1975. The standard ISO 1185 for trailer connectors was developed in the early 70s to create a standard in the commercial vehicle industry for the electrical connection between towing vehicle and trailer. ![]()
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