In my car the battery light stays on.
The alternator is running, but the battery is not charging.
After checking that the problem is not caused by the car, I test the alternator on the table.
I test it with a drill and find that it doesn't work.
Before I open the dynamo, I will briefly explain the role of the dynamo
stator and the rotor.
I show you the diagrams of the alternator components:
The stator, the rotor, the regulator and the diode bridge.
I test the rotor with a multimeter
I test the controller, it doesn't work.
I test the stator and the diode bridge together and separately.
I notice that a diode is shorted on the diode bridge.
I replace the diode bridge with a new one and mount it back on the alternator.
Then I install the alternator in the car.

0:00 Introduction
1:06 Test of the alternator in the car
5:41 Test of the alternator on the table
6:27 Operation of the alternator
9:02 Presentation of each part of the alternator
9:47 Tests on the rotor only
11:08 Tests on the controller only
13:44 Tests on the stator and the diode bridge
15:36 Removal of the diode bridge
16:31 Tests on the stator only
17:52 Induction measurements on the rotor and stator
19:05 Tests on the diode bridge only
23:02 Reinstall new diode bridge
25:56 Reassemble the alternator and reinstall it in the car

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