2. Focusing adjustment of front combination lamp
(1) Car preparation: Ensure the part around front combination lamp is not damaged or distorted,
fuel tank filled. Make sure unladen mass of complete vehicle: Fill coolant to designated level;
charge the tire to proper pressure, put spare wheel, jack, and tool kit to original position, and
empty the luggage boot, a man of common weight (75kg) seated at driver’s seat.
(2) Focusing preparation: Park the car at a dark place, to observe the boundary between
brightness and darkness of the light. The boundary is quite obvious, below which the light of front
combination lamp is visible, while above which the light is invisible. The car midline is angulated at
90 degrees to the wall, a distance of 3m between the car and wall available. Park the car on a level
ground, several jounces operated to stabilitate the chassis. A thick white paper (2m×4m) is
furnished as screen, on the central of which a vertical line is drawn (V-line), as shown in Fig. 4-78,
set the screen (erect the screen on the ground, to align the V-line to car midline). As shown in Fig.
4-79, base lines are drawn on the screen (H line, left V line, right V line). The base lines differ from
low beam as well as high beam check: Line out the center mark of front combination lamp bulb on
the screen, H line (height of front combination lamp) is drawn a horizontal across the screen to
traverse the center mark, left V line and right V line (center marks of left combination lamp and
right combination lamp respectively) are drawn two verticals to cut H line at their respective center
mark.
Fig. 4-78
Fig. 4-79
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