ISO 11446

ISO 11446:2004 specifies a 13-pole electrical connector between towing and towed vehicles with 12 volt electrical system.

ISO 11446
Type Trailer Connector
Superseded ISO 1724 (12N)
ISO 3732 (12S)
Pins 13
Pin 1 Left indicator
Pin 2 Rear fog lamp
Pin 3 Earth
Pin 4 Right indicator
Pin 5 Right tail lamp
Pin 6 Brake lamp
Pin 7 Left tail lamp
Pin 8 Reverse lamp
Pin 9 Permanent power
Pin 10 Switched supply (for fridge)
Pin 11 Earth for pin 10
Pin 12 Trailer Presence Detection
Pin 13 Earth for pin 9


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