The car Stoplight joins by means of the switch of a signal of braking which is attached to an arm of pedals. By pressing a pedal of a brake the spring translates a switch pin in position "is included", contacts of the switch of braking close a chain of stoplights.

Good visibility of a stoplight is provided with use of a spherical lamp накаливания capacity of 5 Vt, pure glass and a lantern normal amount in a lamp накаливания.

Working capacity of stoplights is easily checked. For this purpose it is necessary to put the car a back part to a wall of garage and to press a brake pedal. On a wall there should be red reflexions from the included stoplights. If one of stoplights does not work, try to replace a bulb. If both stoplights, that, probably have failed, the safety lock or the switch of a signal of braking as very seldom happens that both lamps have simultaneously fused is faulty. If stoplight lanterns are not switched off, and lamps накаливания, connecting plugs of wires, wires and safety locks are in good repair the switch of a signal of braking can be the faulty.