Problem with the voltage regulator CPI Hussar ?

Hello together, have the following problem. After my battery was overcooked, the voltage regulator was replaced which could have been the reason for this error.Now I changed the chipping regulator and all the bulbs including indicator lighting burned through. Since I measured half-gas at the headlight approx.25 V the suspicion was close that I had bought the wrong or defective clamping transducer. So voltage converter changed (obviously to And now the incredible – since the installation I can no longer measure DC voltage on the headlight. But I now have an AC voltage of approx.25 V at half-gas. I can be mistaken but I am sure that this has to be a DC voltage. I own a CPI Hussar Bj 2001 Even though this already says everything that it is a CPI I would be very happy if you could help me !!