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Author Topic: Headlight aim  (Read 680 times)

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TheBoy

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Headlight aim
« on: 06 February 2010, 12:20:37 »

Any advice on how to set headlight range?

I've set mine to be level (one the flat bit of beam, not left kick-up) by marking garage door, and then driving further away, and beam still in same place on door.  Trouble is, driveway does slope slightly.

Would this be right, or still too high?
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Bionic

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Re: Headlight aim
« Reply #1 on: 06 February 2010, 14:23:14 »

Not certain but when I did mine like that the mot guy said it was too high. I took it elsewhere and it passed so f knows. Probably best if you took it into a mot station first thing in a morning and spun the shit about "it hitting a pothole and it getting knocked out of line so can you quickly check it pretty please". Might cost you a drink but at least it will then be to mot standard.
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al brown

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Re: Headlight aim
« Reply #2 on: 06 February 2010, 16:43:59 »

Depends how far you drove back, but then on an incline its gonna be hard to get any idea. IIRC they should point down by 1* or so, which is almost flat. If you dont have access to a flat area, you can get it close by measuring the light height and taking an inch off. Mark that new height on your garage with the car up pretty close. Not the best, but then it should be done properly when you get achance.
Al
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feeutfo

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Re: Headlight aim
« Reply #3 on: 06 February 2010, 17:25:49 »

i aked exactly this and reply was, there is a marking on the head light that gives a percentage lower, usually one degree iirc, so this should equate to a ratio, ie any distance from the door should mean a percentage drop of the beam according to the haed light marking...

...or, reverse up 8ft and set the beam between half to one inch below the original mark. I set mine to half an inch below and it passed but i expected it to be too high.

Drive does not need to be level, just flat so the car reverses is back on the same plane. hth
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TheBoy

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Re: Headlight aim
« Reply #4 on: 07 February 2010, 11:19:50 »

Quote
i aked exactly this and reply was, there is a marking on the head light that gives a percentage lower, usually one degree iirc, so this should equate to a ratio, ie any distance from the door should mean a percentage drop of the beam according to the haed light marking...

...or, reverse up 8ft and set the beam between half to one inch below the original mark. I set mine to half an inch below and it passed but i expected it to be too high.

Drive does not need to be level, just flat so the car reverses is back on the same plane. hth
What I have done (though set by arsing about with tech2 rather than adjusters, so could probably do with doing it properly)
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Humpy

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Re: Headlight aim
« Reply #5 on: 07 February 2010, 11:34:08 »

I took a battery drill with a hex bit along when I got the MOT done and did them there and then as I guess they were out.

Humpy
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Kevin Wood

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Re: Headlight aim
« Reply #6 on: 07 February 2010, 13:20:55 »

Quote
I took a battery drill with a hex bit along when I got the MOT done and did them there and then as I guess they were out.

Humpy

I wouldn't adjust it with a drill, TBH. The adjuster mechanisms are a bit fragile for that.

The beams should drop slightly as you move back from the door, as said.

I would say the best way to effect a DIY adjustment is to do the garage door thing and then take it out at night and compare the position of the beam cutoff on the road with other cars. Take an allen key with you and it's not too bad to give it a little tweak as required.

Kevin
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