Execution sequence
1. We prepare the car for operations (see "Vehicle preparation for maintenance and repair").
2. Disconnect the wire blocks 1 from the switch.
3. Key at 19 mm loosen the lock nut 2 and, turning the switch 4, make it touch the stop of the pedal 3.
4. Tighten the locknut and randomly connect the wire blocks.
If the incomplete release of the brake mechanisms could not be eliminated by adjusting the position of the brake signal switch, then it is necessary to check the amount of protrusion of the rod head relative to the plane on the housing of the vacuum brake booster (see "Vacuum brake booster - replacement").