Seat Mii – turn signal front right does not blink

Hello experts, I am looking for hints on how I can convince the turn signal in the front right again to the employee. It is about the Mii of my wife, built in 2015. Symtom: The turn signal in the front right doesn’t play along, it just doesn’t light up. Neither with the “normal” blinking, nor with the warning blinking system, nor with the opening or closing of the ZV. Light bulbs and sockets are OK (even though sometimes changed, no improvement). The turn signal in the right back and right at the side flash normally, the control lights and the sound have the usual, hectic frequency, because, yes, a bulb “misses”. Since only the indicator lamp and the “crack generator” (sound) are faster, the external flashers flash in normal rhythm, it is probably in the meantime an electronic control and not a classic flash relay anymore. I slowly get old. When I measure on the plug in front of the engine room, a pin is usually on mass. When blinking it then goes to the rhythm of the other flashers from +12V and in the pause So looks good for me, the other pin seems to always hang in the air, I never measure mass or 12V. I would expect it constantly on mass, then the turn signal would light up safely. So I type on a cable break or defective plug connection “on the way”. Unfortunately, the cable disappears after a few centimeters in the wire harness of the right lamps and then quite quickly through the spray wall towards the interior. Can someone tell me where the Is there something like a “blinker controller” or “light controller”? If so, where is it? Is there a pin assignment? Does anyone even have a small plan from which the circuit diagram or circuit diagram for this part emerge? If I had the counterpart to my plug on the indicator, I could pull it off, test it for passage and (hopefully) also find the cable break, in case of need with a signal injector and a sample. Or even better: Does someone know a known sc hwachstelle, which I should look at every FAll? I am grateful for every hint!