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Thread: MOT regs

  1. #11
    Senior Member Leeds883's Avatar
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    Quote Originally Posted by Bigdjag View Post
    If only it were that easy because when you turn the ignition on the lights come on including the rear indicators (running lights) when you hit the brakes the tail brake light comes on and the indicators (brake lights) get brighter like the tail brake light. Switch on the indicators they flash whichever side is selected then hit the brakes and the opposite indicator lights up but the selected indicator keeps flashing. When I looked at the wiring there are only 2 wires to each of the indicators as in the diagram above that's what is baffling me. I'll try and get a video of it and post it up.
    I thought this was exactly how the American lights worked? The indicators work like a kind of day time running light until you select left/right and then they operate as indicators. I'm not sure there is a fault here

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    Lots of old American cars over here with red indicator lens that seem to get through their MOT's.
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  4. #13
    Senior Member Leeds883's Avatar
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    Indicators have got to be amber in colour. The only exception is for vehicles used before September 1965 where the indicators are combined with the brake lights in the back or side lights in the front. In this case the front indicators can be white and the rears red

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  6. #14
    Senior Member K9F's Avatar
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    Quote Originally Posted by Leeds883 View Post
    ....... I'm not sure there is a fault here
    I read it differently, all works well until the brake is applied and then the opposite side lights up, my assumption was front and rear but you may be right in the fact everything is as it should be? In that case £2:88 X 2 plus ballpark £7 postage and he’s sorted.

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  7. #15
    Senior Member Leeds883's Avatar
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    Quote Originally Posted by K9F View Post
    I read it differently, all works well until the brake is applied and then the opposite side lights up, my assumption was front and rear but you may be right in the fact everything is as it should be? In that case £2:88 X 2 plus ballpark £7 postage and he’s sorted.
    On american bikes, I think the indicator IS the brake light as well. So what he means is when you are indicating and then hit the brakes, the selected direction indicator continues flashing but the other side comes on and stays on while you are braking. That's how I read it anyway and I THINK that is how it is meant to work for the american market.

    Unfortunately it wont be a case of just swapping the lens/bulbs out for the correct colour, as the way the American lights function wont pass a UK MOT. One light is not allowed to affect the operation of another. Depending on how it wired, this might be a tricky one to sort.

  8. #16
    Senior Member K9F's Avatar
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    Double filaments, a change of filament holder, an extra twisted pair cable run to each light and a change of existing relay should do the trick methinks? If the third central light also has a brake function you could ditch the brake function from the indicators completely in which case you only need to run a single extra wire to each light.

    IF YOU GO THROUGH LIFE WITH YOUR HEAD IN THE SAND.....ALL PEOPLE WILL SEE IS AN ARSE!!
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  9. #17
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    Well guys thanks for all the help. The mystery is solved. I removed the seat and found that the previous owner (American ) had fitted one of those light modulators. Removed it and reconnected the plugs hay presto all works as it should. So now I can get it mot'd and registered but I think I will refit the modulator once it's mot'd as I like the look of it that way. Once again thanks for all the help

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  11. #18
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    Quote Originally Posted by Leeds883 View Post
    On american bikes, I think the indicator IS the brake light as well. So what he means is when you are indicating and then hit the brakes, the selected direction indicator continues flashing but the other side comes on and stays on while you are braking. That's how I read it anyway and I THINK that is how it is meant to work for the american market.

    Unfortunately it wont be a case of just swapping the lens/bulbs out for the correct colour, as the way the American lights function wont pass a UK MOT. One light is not allowed to affect the operation of another. Depending on how it wired, this might be a tricky one to sort.
    Hi Leeds does the quote in red mean these lights https://www.alchemyparts.co.uk/motor...stom-set-of-4/ would fail a MOT. I only ask as I am building a custom bike and was thinking of using these.

    Pete.
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  12. #19
    Senior Member K9F's Avatar
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    Morning Pete,

    The old lighting MOT Conundrum? Everything as usual will purely depend on how anally retentive your tester on the day happens to be. With the advancement of LED technology much still pertains to incandescent lighting as the MOT guidelines haven't kept up with the advancements. The only reference at a glance I can find is the one Leeds referred to under 'reasons for rejection' which was "not working or not flashing 60 to 120 times per minute, or which is affected by the operation of another lamp."


    Day of MOT if your 'custom bike' is fitted with your proposed indicators in such a fashion that they can be removed easily on the day if he fails them you can always whip them off and leave with an MOT Certificate regardless. Or go show your MOT tester your intended purchase and see what he says. It doesn't matter what anyone 'thinks' on here as they won't be authorising/signing off on your MOT!

    IF YOU GO THROUGH LIFE WITH YOUR HEAD IN THE SAND.....ALL PEOPLE WILL SEE IS AN ARSE!!
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  13. #20
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    4.4 Direction indicators

    4.4.1 Presence, condition and operation

    You must inspect all direction indicators.

    Direction indicators aren’t needed for motorcycles that:
    •don’t have front and rear position lamps
    •have front and rear position lamps permanently disconnected, painted over or masked
    •can’t exceed 30mph / 50kph
    •was first used before 1 August 1986
    •are ‘off road’ motorcycles designed to carry only the rider
    •are ‘off road’ motorcycle combinations designed to carry the rider and one passenger in the side car

    ‘Off road’ motorcycles are constructed or adapted primarily for use off road. For example, their tyres, suspension or ground clearance have been adapted for off road use.

    Direction indicators must emit amber light, except motorcycles first used before 1 September 1965 can have white front indicators and red rear indicators.


    If you 'whip off' the indicators will it pass MOT? only if in any of the above categories....

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