Kymco Zing 125: Diagnosing 4-pin Regulator Charging Issues with Wiring Diagrams Provided

Hello, I need help in repairing the above-mentioned motor. I only have a diagram that someone has "fumbled" in my bike before and the reality does not quite agree with the diagram. Namely, it currently looks like I have a 4-pin regulator. Connected by this scheme:




Where to start the diagnosis?

The scheme looks like this:



I will add that I have checked the continuity of the wires and there is no puncture anywhere, 3 cables come out of the generator itself and the pink cable is connected to ground, which should not happen?

If the lights were originally powered by a battery, why combine with a Chinese regulator and reworking the installation?
Fit the regulator intended for the "two-phase" alternator and connect to the original. Both wires from the alternator (yellow and pink) must not have a ground fault and must be connected directly to the regulator.

Quote:

If the lights were originally powered by a battery, why combine with a Chinese regulator and reworking the installation?

Originally by of the light diagram are connected to the magneto - unless I can not read the diagrams? And currently, as far as I know, I have the battery connected because there is no charging and the lights are shining and the regulator itself has 4 pins?

And the short circuit to the ground of the pink wire is directly on the bundle coming out of the magneto, so it's possible that something inside is no longer demanding?