ISO 1724:2003 PDF

Scope: This International Standard specifies the dimensions of, and contact allocation tests and requirements for, 7-pole connectors of type 12 N for the electrical connection of towing and towed vehicles with 12 V nominal supply voltage, thus ensuring interchangeability. NOTE For new developments and where more than 7 poles are required, as an alternative to the use of the 7-pole connector in accordance with this International Standard and ISO 3732, the use of the 13-pole connector in accordance with ISO 11446 may be required.

ISO 1724:2003 Referenced Document

ISO 1103 Road vehicles - Coupling balls for caravans and light trailers - Dimensions*， 2007-06-01 Update
ISO 3732 Road vehicles - Connectors for the electrical connection of towing and towed vehicles - 7-pole connector type 12 S (supplementary) for vehicles with 12 V nominal supply voltage
ISO 4091:2003 Road vehicles - Connectors for the electrical connection of towing and towed vehicles - Definitions, tests and requirements

2003 ISO 1724:2003 Road vehicles - Connectors for the electrical connection of towing and towed vehicles - 7-pole connector type 12 N (normal) for vehicles with 12 V nominal supply voltage
1997 ISO 1724:1997 Road vehicles - Electrical connections between towing and towed vehicles with 12 V systems - 7 pole connector type 12 N (normal)
1980 ISO 1724:1980 Road vehicles; Electrical connections between towing vehicles and towed vehicles with 6 or 12 V electrical equipment; Type 12 N (normal)
1975 ISO 1724:1975 Title missing - Legacy paper document