Checking the generator on a car (all models) (Peugeot 305)

1. If the generator does not charge the battery, check the condition of its drive belt and its tension. Check the reliability of the generator and battery wires.

2. To accurately measure the generator output current, special equipment is required. It can be roughly estimated using a 0-15V or 0-20V voltmeter as follows.

3. Connect the voltmeter to the battery terminals. Turn on the headlights and note the voltmeter readings: the voltage should be 12-13 V.

4. Start the engine and let it run at fast idle speed (approximately 1500 rpm). The voltmeter should show 13-14 V.

5. With the engine still running at fast idle, turn on as many electrical consumers as possible (rear window defroster, interior heater blower, etc.). The voltmeter should still show 13-14 V. If necessary, you can increase the engine speed slightly so that the voltage does not drop.

6. If the generator charges the battery poorly or does not charge it at all, inspect the brushes. If they are okay, you should consult a specialist.

7. It is possible that the generator produces too high a current. Signs of this include constantly burning out lamps, a noticeable change in the brightness of the lamps depending on the engine speed, overheating of the generator or battery, and the release of steam or smoke from the battery. The cause of this is almost certainly a faulty voltage regulator, but even in this case, specialist intervention is required.

Source of the article is posted at (peugeotbook.ru)