| Number | X-pin, colour | Description |
|---|---|---|
| X57 | 9 -pin, Black | Plug connector Unloader relay terminal R |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | A | Radio ON/antenna signal | Plug connector, radio |
| 3 | Not used | ||
| 4 | M | Ground | Ground connector |
| 5 | Not used | ||
| 6 | E | Voltage supply terminal 30 | Fuse F66 |
| 7 | Not used | ||
| 8 | E | Voltage supply terminal R | Fuse F43 |
| 9 | Not used | ||