Over charging now, no ballast resistor

Have you measured the running/ charging voltage at the battery? Make CERTAIN that the VR is grounded and that it is wired correctly and getting battery voltage to the blue wire

WHAT year make and model?? More important, what kind of alternator and VR?

Stock pre 70? Stock 70/ later?

Is it possible that the battery is simply way down, or that it is defective?