ISO 11446
ISO 11446:2004 specifies a 13-pole electrical connector between towing and towed vehicles with 12 volt electrical system.
| Type | Trailer Connector | ||
|---|---|---|---|
| Superseded |
ISO 1724 (12N) ISO 3732 (12S) | ||
| General specifications | |||
| Pins | 13 | ||
| Pin out | |||
 | |||
| 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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