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Thread: Headlight wiring ?

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  1. #1
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    Headlight wiring ?

    I have an 1978 R100/7, nothing fancy.

    My question is this. I want to disable the "always on" feature of the headlight, and put a switch in - similar to the way my older /6 had the set up. I want the light to come on only when I turn it on, but not on all the time. I also want the headlight "flash" feature to work all the time. Right now, when I turn on the key, the headlight comes on, and stays on even when going through starting. I am sure this pulls power from the starting process.

    Has anyone re-wired for this. I think it is a simple matter of wiring in a switch on a power line that runs from the headlight key switch, to the headlight relay. If I am right can someone confirm?

    Thanks

  2. #2
    Sir Darby Darryl Cainey's Avatar
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    You have to buy a European Headlight Switch from BMW, any BMW Dealer should be able to get one for you.

    I have one on my 1977 R100RS.

    Good luck they cost around 118 pounds from Moto Binns in the UK,

    From Max BMW $108.19

    Part # 01 61 31 1 243 866 for higher bars like on a standard bike not RS
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    Last edited by DARRYL CAINEY; 03-24-2013 at 12:24 PM. Reason: addition
    Ambassador BMW MOA Ontario Canada
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    1977 R100RS, (Retired) 1993 R100GS (just getting started)

  3. #3
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    Quote Originally Posted by DARRYL CAINEY View Post
    You have to buy a European Headlight Switch from BMW, any BMW Dealer should be able to get one for you.

    I have one on my 1977 R100RS.

    Good luck they cost around 118 pounds from Moto Binns in the UK,

    From Max BMW $108.19

    Part # 01 61 31 1 243 866 for higher bars like on a standard bike not RS
    ------------------------------
    I really don't want to buy another handlebar switch.

    What I want to do, if possible, is to wire in a "rocker" or "toggle" switch and either mount it in my fairing or Hide it in my fairing.

    If I read the wiring diagrams (I have two different ones that both claim to be for my 1978 R100/7). One has a wire labeled "USA only" that runs from the key ignition switch directly to the headlight relay, the other does not. Both diagrams have the newer left handlebar control that does not have the traditional headlight switch.

    I would like to add my own (hidden) switch to do the same thing as the old switch did and STILL leave the headlight "flash" feature that both old style and new style bikes have so that I can use intermittently as a "warning" to oncoming traffic or traffic that might pull out into my path.

    Thanks,

  4. #4
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    headlight switch

    I've done it both ways, with the euro switch and with a toggle on the fairing. I believe you're right about the wiring. With the toggle, I believe I just took the live feed (red, I think) which goes to the headlight relay inside the shell and ran couple of wires back out through a grommet on the back of the shell and put the switch in line on the red feed. I don't recall having to tinker with the greed wire from the ignition switch. The euro switch is the better option for me.

  5. #5
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    Euro switch - left handlebar

    Does anyone know if the left handlebar switch on the older /6's and /5's is the same as what people are calling the "Euro Switch"? Would one of them be workable even if not exactly the same?

    If so, I might could find a used one to purchase at a more affordable price!

    Otherwise, I want to just wire in a rocker or toggle switch and hide it inside the fairing.

    As to the color of wires, I looked inside my headlight shell, and off the key switch, it appears to be the only connection on it with 2 wires together - and the color of the wires is green. One of them goes to one of the wiring harnesses that also comes into the shell, the other goes to a fuse connection where another green wire (unfused) runs from the connection back out to the light relay. This is the one that appears to be the one to "tap" into with the switch.

    There are no red wired from the key switch, but there is a red wire in the shell that connects to something. But, I think, both red wires in there are "hot" all the time - i.e. not fused at all. One of them runs, I think to the light relay - which may be the "hot" lead to the relay. That would explain why tapping a switch there would work.

    Anybody have any suggestions? Does anyone know for sure how to do this where it will replicate the older method off the handlebars on the /5's and /6's ??

    Thanks to all of you - you are are GGGGRRRREEEEEAAAATTTTT!!!

  6. #6
    Registered User lmo1131's Avatar
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    Does anyone know if the left handlebar switch on the older /6's and /5's is the same as what people are calling the "Euro Switch"?
    A toggle switch would work for a while... remember, you're pumping 55 watts through it. Not exactly what they're designed for.

    Anybody have any suggestions?
    I'd take Darryl's advice and spring the $108, or whatever it is, and be done with it. A nice, clean, predictable, reliable setup where everything falls to hand without having to mess with an aux switch.

    Definitely not anything found on a /5.
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    "It is what you discover, after you know it all, that counts." _ John Wooden

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    1973 R75/5 - original owner

  7. #7
    Monza Blue 1974 R90/6
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    Quote Originally Posted by jimmylee View Post
    Does anyone know if the left handlebar switch on the older /6's and /5's is the same as what people are calling the "Euro Switch"? Would one of them be workable even if not exactly the same?!!!
    I am pretty sure that when folks are talking about "euro switches" it is the keyed ignition switch. European models have an extra position or two in the ignition switch, one of which let's you start and ride without the deadlight being energized.

    The left side handlebar switch on the /5 and early /6 models doesn't turn the headlight on and off. The up position turns on the high beam and the low position flashes the headlight.

    Barron

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