Maintenance work
The Vectra obeys the steering even if the servo control fails. But in this case, the steering has a much heavier stroke. The moment of immediate danger is fear, when the servo control suddenly fails while driving.
Servo support works flawlessly if the steering wheel is much easier to turn with the engine running than with the engine off.
In addition, the steering wheel must rotate without jerks from lock to lock,
After the turns, it should itself return to the middle position.
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