Abstract: An installation for the control of the brake force at the wheels of motor vehicle combinations, such as of truck-trailer combinations, in which one locking protective brake force control system each is coordinated to the truck and to the trailer which operate independently of one another, and by means of which each individual wheel is controllable within the stable range of the friction value-slippage-curve; a measuring device is thereby arranged in the connection between the truck and the trailer for measuring the tow bar force occurring thereat, whereby this measuring device is connected with the locking protective brake force control system of the truck and is operable to produce a signal when a predetermined, pushing tow-bar force value is exceeded, which blocks an increase of the brake force at the truck for the duration of the presence of the signal from the measuring device.