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Posted

Hello there.

 

I have seached the forum for this topic, but haven't been able to find anything, sorry if it's a repeat.

 

I failed the MOT on my offside headlight adjustment. How can I adjust it/fix it

 

thank you

Posted

First it is worthwhile checking the bulb is correctly fitted and the light unit is also fitted correctly. According to the Haynes manual for the halogen bulbs (not xenon gas discharge ones) the headlight adjustment screws are on the back of the headlight units.

It looks as if one is in the middle towards the top, the other will be to one side. It may take a screwdriver or an allen key but it does not say. Try half a turn one way to see which way it needs turning. Usually there are 2 screws, one does the height adjustment and the other the sideways adjustment.

 

It pays to have the car on level ground and pointing at a wall a few yards back, preferrably as it is getting dark. The car should not be loaded up and have nobody sat in it. The dip beams pattern level part at the wall should be slightly lower than the lights on the car, with the point at which the pattern turns up directly in line with each light on the car or slightly to the left. If one light has been passed for the MOT use this as a guide for the other one.

 

As for the MOT, whilst the car was being tested it would only have taken a couple of minutes for the tester to adjust it since it would already have been positioned at the testing unit. Is this all it failed on seems it seems a bit petty to not adjust it at the time ?

Posted

Thank you.

 

It turns out that when fitting a new bulb I bent away the small reflector inside the headlight, bent it back and it works fine. I adjusted the dips with an allen key.

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