SAFARI

ELECTRICALS

Head Lamps :

The Head Lamp provides two types of light beams -

a high beam to give max. light well ahead of vehicle

and a low beam which is shorter and lower so that it

should not dazzle the oncoming drivers and can be

used in low visibility area.

Head lamp also has parking lamp and a separate

pencil beam for high visibility which comes on with

high beam.

The head lamps must be properly aligned in order

to obtain max., proper road illumination and reduced

glare for oncoming traffic. It is recommended to check

alignment of head lamp beams periodically.

Adjusting Head Lamp Focus with the Help of

Screen (RHD)

The vehicle should be parked ten meters away from

the screen on flat ground with its centre in-line with

central vertical line on screen and screen at right

angles to longitudinal axis of the vehicle. The vehicle

should be in unloaded condition with no sag in

suspension springs and all tyres equally inflated.

On the marked up screen as shown in Fig. 18, area

above horizontal and inclined lines (shaded) is called

‘Dark Zone’ and the area below is called as the

Illuminated Zone.

Each head lamp is aligned individually by masking

the other head lamp. Head lamp is first adjusted for

proper height of low beam by adjusting screw (Fig.

17) at its top.The rubber grommet fitted on cab above

head lamp is required to be unscrewed and removed

for accessing the head lamp adjusting screw. Light

from low beam should fall below horizontal and

Fig. 18 Adjusting Head Lamp Focus with the Help of Screen

Fig. 17 Head Lamp

inclined lines. No light should fall above these lines

i.e. in Dark Zone. Thereafter lateral adjustment is

done by adjusting screw (H) at the bottom of head

lamp so that contour of low beam coincides with

contour formed by horizontal and inclined lines below

“Dark Zone”.

When properly adjusted, most brightly illuminated

area will be just below the inter section point ‘A’ of

these two lines.

Now switch ‘ON’ high beam.They will be symmetrical

above points ‘A’ & ‘B’ of intersection of vertical lines

and horizontal lines.

It is possible that high beam may not be exactly

symmetrical but for this reason head lamp should

not be realigned. Preferably alignment should be

done in dark.