| Number | X-pin, colour | Description |
|---|---|---|
| X904 | 4 -pin, Black | Plug connector Blower ballast resistor |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | A | Heater blower Stage 3 | Blower switch |
| 2 | A | Heater blower Stage 2 | Connector, blower Stage 2 |
| 3 | A | Heater blower Stage 1 | Blower switch |
| 4 | A | Heater blower Stage 4 | Connector, blower motor |