Miata Mailing List: December 1996, Message #99
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   From: (none)

Subject: from the INTERAUTO 'BOSCH Electrical Systems for Automobiles

   Date: (none)



Classification:

Prologue:

Epilogue: bt



for you trivia fans, from my Opel days, cpyrt 1972



Headlamp Adjustment  (professor clears throat :-)

(pg 38, btw, if you're reading along...)



describes a german 'officially suggested test screen' (DIN?)

for headlamp adjustment at a distance of 10 metres.



an horizontal line is scribed 180 cm using 10 cm spacing for

5 cm dashes (germans, nein?)



at the center (90cm) go up 10cm and scribe a cross 5cm each arm

(oh, btw, each line is def'd at 1cm :-) VBG



from the center of the horizontal which you have already

had to determine scribe a line (blank the first 30 cm)

15 degrees from the horizontal above the horizontal

on the right side of center for 55 cm (blank the first 30,

as you recall, leaves 25 cm of 1 cm wide line.

unless you live in the extended kingdom or elsewhere where it

is important for the dexter side to face oncoming traffic...then the

line ascends to the left of the center



you need two copies of this industrial art, set 10 metres from

your headlamps (car and all...) on a level surface.

directly in front of your miata (content:-), perpendicular

to the long axis of your car, etc...



i forgot, it is suggested that you label the cross

"headlamp centre" (british publisher) 5 cm above it



finally, how to adjust your hellas:



"The centre of the headlamp beam (they mean the high beam,

Yanks) should coincide as closely as possible with the

marking 'headlamp centre'. (didja measure that?-ed.)



The decisive factor, here, however is the adjustment of the

dipped beam and the headlamp must be subsequently set higher

or lower to achieve the correct dipped beam setting.



..



the bright/dark border should lie to the left or the right

(british again -ed.) or the marking 'headlamp centre' and

10 cm below the level of the headlamp centre line.  On headlamps

with European asymmetrical dipped beams (Hella, Cibie, etc - ed.)

the bright/dark border may rise at an angle of degrees  to the

right or left of the marking 'headlamp centre'."