Skoda Octavia II 2 - Front wipers not working, Washers approx.

Hello,
The wipers in another car work (I changed the engine to a different skoda and it comes)
I checked if the motor on the plug has power and signal.
there is a constant mass and one constant plus 12.5V, on the other + shows me a voltage of 10.5V but constantly !?
1) Should this signal not change depending on the position of the wiper switch on the steering wheel?
Checked VCDS and shift lever show exact position
2) The mask closing sensor works that when the mask is closed, the diode indicating the mask has opened.
3) I have replaced the comfort module - the car has no ordinary wiper relay?
4) Windshield washers are working and the rear wiper works flawlessly.

Best regards and thank you.

And the shoulder axes did not stand?

No, I reached out with my arms connected to the second skoda and everything is going on.

You measured the voltage with a cube meter. Measure some light bulb

good good, there is only power and LIN. probably LIN transceiver in the engine or in Bordnetz.

damdam wrote:

LIN

Will it crash a master-> slave communication error?
However, since it has 10.5V, it would come out that the controller receives a static bus signal.

I had the same case yesterday. All voltages including signal were OK. There was a voltage problem when the controller attempted to start the engine. The voltage dropped and caused a communication error.
The reason was a frayed cable in the bundle passing next to the right rear corner of the battery base. Vibrations and time have done their job. The remaining patina was conducting something, so the idle tensions were OK.