Helpful advice. Recently, many companies have appeared that specialize in repairing imported starters and generators. They can diagnose a faulty unit, purchase spare parts for any generator (starter) model, and receive qualified advice. If you are not sure that you can repair a generator (starter) yourself, it makes sense to contact such a company, where repairs of these units will usually be performed quickly, with high quality and at an affordable price. However, on cars with high mileage, it is often more profitable to replace the unit as a whole with a new one than to replace the failed parts.
Possible generator malfunctions, their causes and methods of elimination
| Cause of malfunction | Method of elimination |
| When the ignition is turned on, the low battery indicator light does not light | |
| Broken wire between generator, ignition switch (lock) and indicator lamp | Fix the break |
| The signal lamp burned out | Replace the lamp |
| Generator faulty (the generator brushes are worn out or do not fit tightly to the contact rings, the generator excitation winding is burnt out, the diode bridge or voltage regulator is faulty) | Replace or repair the generator |
| The low battery warning light does not go out after starting the engine | |
| Weak alternator drive belt tension | Adjust the belt tension |
| The generator diode bridge is faulty | Repair the generator |
| Short circuit of the wire between the generator and the signal lamp to "ground" | Insulate the wire |
| The low battery indicator light comes on when the ignition is off | |
| Generator faulty | Replace or repair the generator |
| The generator does not charge the battery | |
| Oxidation of battery terminals | Clean, secure and lubricate the wire ends and battery terminals with petroleum jelly |
| The battery is faulty | Replace the battery |
| Weak alternator drive belt tension | Adjust the belt tension |
| Generator faulty (diode bridge) | Repair the generator |
| The battery is recharging | |
| Generator faulty (voltage regulator, diode bridge) | Check, clean, tighten or replace contact connections in the ignition switch, fuses, connectors; check the connection of the generator housing to the "ground" |
| Increased voltage drop in the generator-battery circuit | Repair the generator |