Pic. 7.22. Checking the voltage regulator relay
Using an ohmmeter, check continuity between diodes F and B (pic. 7.22).
Attention! When the positive and negative poles between terminals F and B are connected in a single circuit, conduction should be in only one direction. If there is continuity in both directions, one of the diodes may be broken. In this case, replace the voltage regulator.
Using an ohmmeter, check continuity between diodes F and E.