- a) Inspect the drive belt to make sure it is tight and not damaged. Replace if damaged (contact the head Current service).
- b) Make sure the alternator mounting bolts are securely tightened.
- c) Check generator wiring and all connectors. All contacts must be reliable and not oxidized.
- d) Check the appropriate fuses located in the engine compartment (contact the head Onboard electrical equipment). If you find a blown fuse, remove the cause of the blown fuse and replace it (if the corresponding fuse blows, you will not be able to start the engine or turn on any of the devices).
- e) Start the engine and make sure that there are no extraneous sounds from the generator (whistling or squealing may indicate a bearing failure or worn brushes).
- f) Make sure the battery is fully charged. If one of the cans is damaged, the battery may draw excess current.
- g) Disconnect the wire ends from the battery (first negative). Inspect the battery terminals and wire lugs. If signs of corrosion are found, thoroughly clean them (refer to chapter Current service). Attach the wire lugs to the terminals and tighten securely.
2. Connect a voltmeter between the positive and negative poles of the battery.
3. Start the engine. The voltage when starting the engine may drop to 8 V (at outside temperature +20°С).
4. Increase the engine speed to 3000 rpm. The voltage in this case should be from 13 to 14.5 V. This indicates the normal operation of the generator and voltage regulator. Generator voltage (onboard voltage) must be higher than the operating voltage so that the battery is recharged when the vehicle is in motion.
5. Check the stability of the voltage regulator. To do this, turn on the main beam and repeat the measurement at 3000 rpm. The resulting voltage should not be higher than the previously obtained value by more than 0.4 V.
6. If the obtained value lies outside the specified value, hand over the generator and the regulator for repair at a service station.