Light flickers when flashing Gsf 600s

Hello everyone. I have a little problem :/ And that is, when I blink, then the light flickers in the flash clock with. What I have heard so far it should probably be a mass problem. Unfortunately I have no idea where to start looking What I have already tried. Battery bridged. No change All turn signals pulled off and only one turn signal on it. No change —– > ( There are no led turn signals installed ) What I noticed. When charging the battery I have the mi nus cable is separated from the battery and minus to the battery directly. I left the plus cable on the battery and the motorcycle. The whole frame can be under current.