| Number | X-pin, colour | Description |
|---|---|---|
| X609 | 16-pin, black | Component connector Trailer module |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | E | Supply Trailer module | Fuse F74 |
| 2 | Not used | ||
| 3 | Not used | ||
| 4 | M | Ground | Ground point |
| 5 | E/A | Signal, CAN-bus | CAN-bus connector |
| 6 | E/A | Signal, CAN-bus | CAN-bus connector |
| 7 | Not used | ||
| 8 | Not used | ||
| 9 | E | Signal, brake light | Light module |
| 10 | A | Signal, left direction indicator light | X630 Trailer socket |
| 11 | A | Signal, right tail light | X630 Trailer socket |
| 12 | A | Signal, right direction indicator light | X630 Trailer socket |
| 13 | A | Signal, left tail light | X630 Trailer socket |
| 14 | A | Signal, rear fog light | X630 Trailer socket |
| 15 | A | Signal, reversing light | X630 Trailer socket |
| 16 | A | Signal, brake light | X630 Trailer socket |