Removal
1. Disconnect the wire from the negative terminal of the battery.
2. Disconnect the connector (1) of the power transistor.
3. Unscrew the screws (2) and remove the power transistor.
Installation
4. Installation is carried out in the reverse order of removal.
Examination
5. Turn on the ignition.
6. Turn the knob and change the fan speed, measure the voltage between contacts 1 and 2 of the transistor connector. If the measured value does not correspond to the nominal value, replace the transistor.
| Fan speed | Voltage, V |
| 1 | 3,8±0,5 |
| 2 | 5,0±0,5 |
| 3 | 6,2±0,5 |
| 4 | 7,4±0,5 |
| 5 | 8,6±0,5 |
| 6 | 9,8±0,5 |
| 7 | 11,0±0,5 |
| 8 | Battery voltage |
