Alternator voltage test

8. If the battery does not charge or is not sufficiently charged while driving, check the alternator voltage.

9. Connect a voltmeter between the positive and negative battery terminals and start the engine. The voltage at start should drop to about 8V (at ambient temperature +20°С).

10. Increase the engine speed to 3000 rpm - if the generator and regulator work properly, the voltage at the terminals should be from 13 to 14.5 V.

11. To check the stability of the voltage, turn on the high beam and repeat the measurements at 3000 rpm. The measured voltage should not increase by more than 0.4 V from the previously measured values.

12. If the indicators are outside the nominal value, the generator and regulator must be checked in a specialized workshop.