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Thread: Headlight Question for the MOT Testers Amongst Us

  1. #1
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    Default Headlight Question for the MOT Testers Amongst Us

    ...or any other well-informed bod. My headlight aim seems to be too low, in that whilst the brightness is fine, the range is too short, and I can no longer see the top of the headlight beam when I park up at home in front of my garden wall. So I took it to my usual MOT place where the owner checked the alignment with the machine, but because he was in a hurry and he's monosyllabic at the best of times, getting info was like pulling teeth.

    Basically, he said the alignment is fine, just 2mm too low on the machine, which he said is not worth rectifying; (2mm too low on a machine just a foot from the car probably translates to a metre or more at the end of the headlight's range on the road though, so I'd like that 2mm back). He then said "it would have passed the MOT [in May] because it's so close to the minimum mark", which I guess means that 2mm below the min mark is just about ok to get a pass.

    Here's my question though: is there a specific height that the beam has to be set at, or is there a range, i.e. a minimum level and a maximum level? This is so I know how much to adjust the beam upwards by - i.e. just the 2mm I'm missing, or can I go further and still be within the correct range?

    Many thanks.

  2. #2
    Regular Member Mr Owens's Avatar
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    Vehicle : Vectra

    Trim : Sri

    Engine : 2.2 direct

    Year : 2004

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    There's about a 5-10mm difference between min and max on the beam tester, just adjust them on the gauge while the headlight setting is on 1 and while your driving just switch to 0 setting to raise the beam height

  3. #3
    Regular Member Sierra2's Avatar
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    Vehicle : Vectra C

    Trim : SRI

    Engine : 1.9cdti (120)

    Year : 2007

    Mileage : 45k

  4. #4
    Regular Member XPCobra's Avatar
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    Vehicle : Vauxhall Vectra Hatch

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    Engine : 1.9 16v 150

    Year : 2006

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    Depends on the beam setter tbh, You could have asked him to adjust them as high as possible

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