Maintenance work
The Vectra obeys the steering even if the servo control fails. But in this case the steering has a significantly heavier stroke. The moment of immediate danger is fear, when suddenly the servo control fails while driving.
The servo support works perfectly if the steering wheel is much easier to turn with the engine running than with the engine not running.
In addition, the steering wheel should rotate smoothly from lock to lock,
After turning, it should return to the middle position by itself.

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