| Pin | Type | Description / Signal type | Connection /
Measuring notes |
|---|
| 1 | A | Trailer right turn signal indicator | Trailer socket X630 Pin 1 |
| | | |
| 2 | A | Coding signal | Light module |
| | | |
| 3 | | Not used | |
| | | |
| 4 | | Not used | |
| | | |
| 5 | A | Signal Brake light | Trailer socket X630 Pin 6 |
| | | |
| 6 | A | Left tail light | Trailer socket X630 Pin 7 |
| | | |
| 7 | A | Right tail light | Trailer socket X630 Pin 5 |
| | | |
| 8 | A | Trailer reversing light | Trailer socket X630 Pin 8 |
| | | |
| 9 | A | Trailer rear fog light | Trailer socket X630 Pin 2 |
| | | |
| 10 | E | Voltage supply terminal 30 | Fuse F14 |
| | | |
| 11 | A | Trailer left turn signal indicator | Trailer socket X630 Pin 1 |
| | | |
| 12 | E | Rear left turn signal indicator | Rear left light I |
| | | |
| 13 | E | Rear left turn signal indicator | Rear right light I |
| | | |
| 14 | | Not used | |
| | | |
| 15 | E | Right brake light | Rear right light I |
| | | |
| 16 | E | Left tail light | Rear left light I |
| | | |
| 17 | E | Right tail light | Rear right light I |
| | | |
| 18 | M | Terminal 31 Power ground | Ground point |
| | | |
| 19 | | Not used | |
| | | |
| 20 | A | Terminal 30, permanent positive for trailer | Trailer socket X630 Pin 9 |
| | | |