Volkswagen Touran in my touran doesn't work the rear right turn singnal, in the front and in the mirror is ok...sicherungskasten

Bulb ?

Bulb are ok

Need to check for power at bulb holder / circuit panel and back trace if none .

Bulb holder and circuit is ok
No power there....

And the same problem is in the bulbs of positions...are 3 bulbs...
2 bulbs work fine, one in thd middle doens't work , no power there...
The same problem with the turn signal...