12N and 12S Connector Terminal Guide

Thursday, 4 December 2014  | 
12N and 12S viewed from the rear of connector

12N Terminals

1
2
3
4
5
6
7

12S Terminals

1
2
3
4
5
6
7
 
 

  The wiring guide presents two common style caravan and trailer towing connectors, configured in their historical terminal functions, the earlier 12N (normal) ISO 1724 for basic lighting supply, and the later 12S (supplementary) ISO 3732 for extended auxiliary functions. The two connectors used for lighting and auxiliary connectivity for trailers and caravans, are joined in the extensive range of power products by a modern 13-pin connector solution.

Terminal Designations.

Pin Cable Colour 12N Plug Term. 12S Plug Term. 12N Connector Function 12S Connector Function
1 Yellow Pin Pin Left-Hand Flasher Lamp(s) Reverse Lamps
2 Blue Socket Socket Rear Fog Lamp(s) No Allocation, Spare
3 White Pin Pin Common Return Common Return, Ground for Pin 4
4 Green Pin Pin Right-Hand Flasher Lamp(s) Power Supply
5 Brown Socket Socket Right-Hand Side and Tail Lamp(s) No Allocation, Spare
6 Red Pin Pin Stop Lamps Ignition Controlled Power Supply, Fridge
7 Black Socket Pin Left-Hand Side and Tail Lamp(s), Number Plate Lamp  Common Return, Ground for Pin 6
 

 

12N and 12S Connectors at Arc Components Limited

This blog post was created: 4th December 2014 and closed for comment 25th July 2015.