r75/5 handlebar light switch disassembly

Discussion in 'Airheads' started by rusty44, Apr 14, 2012.

  1. rusty44

    rusty44 Been here awhile

    Joined:
    Dec 23, 2009
    Oddometer:
    459
    Location:
    Arkansas
    I FOUND OUT

    I found the reason for my having no headlight.

    The green/red and yellow/white wires were pulled out of the circuit board of the handle bar headlight switch.

    I can push the wires back in the holes but that is no fix!!!

    How do you take the switch apart?

    Any secrets?

    Anybody know someone who repairs these?
    #1
  2. Bill Harris

    Bill Harris Confirmed Curmudgeon

    Joined:
    Sep 20, 2008
    Oddometer:
    8,958
    Location:
    backwoods Alabama
    Not difficult, but there are a lot of fiddly little parts that you have to keep up with. The first surprise is the e-clip that holds it all together.

    Duane Ausherman has an article on /2/5 switch repair in his Electrics Section:

    http://w6rec.com/duane/bmw/

    I'd photograph everything with a digital camera as I disassembled it just in case the memory needed a jog. It's not hard, just be careful...
    #2
  3. rufusswan

    rufusswan Been here awhile

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    Nov 16, 2007
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    Branson MO
    It's doable, but you might get prepared to drop the circlip BEFORE you start working on the switch. I dropped one on a dirt floor and searched for hours. Luckily I found it the next morning when early morning sunlight glinted on it.
    #3
  4. rusty44

    rusty44 Been here awhile

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    Dec 23, 2009
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    459
    Location:
    Arkansas
    is the circlip on the shaft in the back or the one on the momentary switch arm that you take off?

    #4
  5. rufusswan

    rufusswan Been here awhile

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    Can't really remember but I think it holds the important parts together inside the switch, such that the parts that have to slide/move when assembled have enough, but not too much, tension.

    The important thing is that each part comes apart one at a time, one step at a time. Once apart you can rehab any part of the switch and reassemble.
    #5