Alternator/Charging System — in-vehicle check (Renault Clio 1)

1. If the charging indicator lamp does not light when the ignition is on, first check the reliability of the generator wiring connections. If the wiring is OK, check that the indicator lamp is not burned out and that the lamp socket is properly located on the instrument panel. If the lamp still does not light, check the integrity of the wiring from the generator to the lamp socket. If the test result does not show any damage to the wiring, the generator is probably damaged.

2. If the alternator indicator light comes on while the engine is running, turn off the engine and check that the drive belt is not damaged and is properly tensioned and that the alternator connections are securely fastened. If everything is ok, check the generator brushes and rings. If the generator still does not work, it should be replaced or an auto electrician should be contacted for inspection and repair.

3. If a fault is suspected at the generator output even when the test lamp functions properly, the regulated voltage can be checked as follows.

4. Connect the voltmeter to the battery terminals and start the engine.

5. Increase the engine speed until the voltmeter reading stabilizes. The voltage should be around 13.5 - 14.8 V.

[Text of the original source on this website: Renaultbook.ru]

6. Turn on as much additional electrical equipment as possible (for example, headlights, rear window defroster, and heater blower) and make sure that the generator maintains voltage within the range of 13.5 - 14.8 V. You may have to increase the engine speed slightly.

7. If the regulated voltage is outside the specified limits, the fault may be due to worn brushes, weak brush springs, a faulty voltage regulator, a faulty diode, a disconnected winding, or worn or damaged alternator rings. The generator must be replaced or taken to a specialist for inspection and repair.