Checking the excitation winding of the generator rotor (VAZ-21011)

The serviceability of the winding and the reliability of the brushes' contact with the contact rings can be checked on a stand, without disassembling the generator, by measuring the resistance between the "67" plug and the generator ground.

If the winding has no short-circuited turns and the brushes are well ground to the contact rings, then the resistance should be 4.2–4.7 Ohms at a temperature of 20°C.

After disassembling the generator, check the excitation winding resistance between the two contact rings, which should be (4.3±0.2) Ohm at a temperature of 20°C. In this case, it is necessary to monitor the reliability of the contact between the rotor rings and the conductors connected to them.

(The text is taken from the online resource: VazBook)