The voltage regulator is designed to maintain the generator voltage at a given levehp a sharp increase in voltage at the output of the generator, the regulator prevents surges and overloads in the power circuit.
Periodic maintenance of the charging system is generally not required. However, you should periodically inspect the alternator drive belt, battery and connecting wires.
The charge control lamp on the instrument panel lights up when the ignition is switched on and goes out after the engine is started. If the lamp does not go out after starting the engine, then the charge circuit is faulty. Some vehicles are equipped with a voltmeter. If the voltmeter shows a very high or very low voltage, then the charge circuit needs to be checked.
Attention! When connecting the battery to the generator, always observe the polarity of the connection.
Attention! Before repairing any part of the car with electric welding, disconnect the wires from the generator and battery.
Attention! Do not start the engine with the charger connected.
Attention! The generator is connected directly to the battery, so if the generator leads are shorted or overloaded, arcing and fire may occur.
Examination
If the battery charging circuit is faulty, perform the following checks before concluding that the alternator has failed.
1. Check the condition of the battery, the condition and reliability of the fastening of wires and connectors.
2. Check the condition and tension of the alternator belt. If signs of wear are found, replace the belt.
3. Check alternator bolts for tightness.
4. Start the engine and check the sound of the generator.
5. Check fusible links, if burnt jumpers of inserts are found, find out the cause and eliminate.
6. Check the battery voltage with the engine off, which should be around 12.5 volts.
7. Connect an ammeter and a voltmeter, start the engine and check the voltage, which should be between 13.5 and 15 V at a current of no more than 10 A.
8. Turn on high beam headlights, air conditioner and heater. During normal operation of the charge system, the voltage should be at least 13.5 V at a current of about 30 A.
9. If the voltage is above 15 V, then replace the voltage regulator.
10. If the voltage is below normal, then connect terminal F to ground and start the engine.
11. If the voltage is normal, then replace the voltage regulator. If the voltage is still low, then the alternator is faulty.