This function was removed by ISO 11446:2004 and the pin reallocated to reserved. ^ Previously allocated to trailer detection in ISO 11446:2002 (the vehicle could detect it was coupled to a trailer using a link between pin 12 and pin 3 in the trailer plug).^ a b Pin 5 and 7 must not be joined in the trailer to avoid problems in vehicles with separate circuits for left and right side.^ a b c Pin 3, 11 and 13 must not be joined in the trailer to avoid interaction between circuit types and over current if one ground pin isn't working.The following supplementary information exists for the connector: Reversing lamps, control current to block surge brakes when reversing. Tail lamps, clearance lamps/outline marker lamps and registration plate lamp left side Tail lamps, clearance lamps/outline marker lamps and registration plate lamp right side Physical design of the standard ISO 11446 but also called Jaeger-connector from the company that developed it. The color coding is defined in ISO 4141-3, but the standard color codes are not always followed and may be different for a particular vehicle.ฤก3-pin trailer connector ( ISO 11446) 13-pin trailer connector of Jaeger type Heavy trucks that may have 12V systems are usually older (vintage vehicles) or on non-European markets. Vehicles and trailers with 6V systems can use the 7-pin or a 5-pin connector, but these are rare today. Exceptions for the 7-pin connector may exist where they may be used for 6V and 24V. The connectors are designed for 12V systems. The 13-pin version being phased in is newer, provides more services than the 7-pin, a more positive locking and also better protection against moisture and contamination. In Europe, both 7-pin (ISO 1724) and 13-pin (ISO 11446) are common. Trailer connectors between the trailer and passenger car, light truck or heavy trucks with 12V systems These are listed below, with notes on significant deviations from them that can cause problems. A number of ISO standards cover trailer connectors, the electrical connectors between vehicles and the trailers they tow that provide a means of control for the trailers.
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