It is most convenient to adjust the headlights with the help of mobile optical devices. If they are not, then the adjustment can be carried out using the screen.
Place a fully fueled and equipped car, with a load of 750 N (75 kgf) on the driver's seat, on a flat horizontal platform 5 m from a smooth wall or any screen (plywood shield about 2x1 m in size, etc.) so that the axis of the car was perpendicular to it. Before marking the screen, make sure that the air pressure in the tires is normal, and then rock the car from the side to set the suspension springs
Draw on the screen as shown in Fig. 7-28, vertical lines, center O, and lines A and B passing through points corresponding to the centers of the headlights. These lines must be symmetrical about the center line of the vehicle. At a height corresponding to the distance of the headlight centers from the floor, draw line 1 and 120 mm below it - line 2 of the centers of light spots.
Pic. 7-28. Headlight adjustment scheme
Turn on the low beam. Sequentially, first for the right headlight (the left one is closed with a piece of cardboard or dark matter), and then for the left (right closed) adjust with screws 1 and 2 (rice. 7-27) headlight beams. For adjusted headlights, the upper border of the light spots must coincide with line 2 (pic. 7-28), and the points of intersection of the horizontal and inclined sections of light spots - with lines A and B.