The front three-point seat belts are always equipped with a device for their tensioning. In a collision, the belts are suddenly tightened (ignited) within 10 ms, and after another 5 ms they hold the occupants, pressing them against the backs of the front seats. This happens automatically. As soon as the strictly programmed braking value is exceeded, the gas generators ignite and tighten the belts. Work on automatic restraint systems is always a case for professionals, they have trained in professional handling of belt tensioners, etc. in special courses. Please gain experience - your own safety and the safety of your passengers is worth it.
Important: Before performing bodywork under the vehicle, disconnect the seat belts.
Please do not work thoughtlessly in the area of seat belts with tensioners: even light blows from a hammer or vibrations from an impact screwdriver can be incorrectly interpreted by the sensors as an accident and cause a fire. For your own safety, disconnect the battery before all bodywork on the underbody of the vehicle. Then allow the airbag and belt tensioner capacitors at least five minutes to "discharge".
The pyrotechnic tensioning device is integrated into the belt buckle
(For details, please visit the website www.fordbook.ru)