Woodmans BMW.

Discussion in 'New Zealand' started by innathyzit, Jan 17, 2014.

  1. Kokopelli

    Kokopelli Yeah, right!

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    Look on the bright side, the charging light is clearly working, but maybe your alternator is not? (I have no idea what I am talking about):lol3
    #81
  2. Padmei

    Padmei enamoured

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    From memory (& we all know how fallible that is) I believe there are two small wires that run to the prong on the starter motor. I could be very wrong but...
    #82
  3. innathyzit

    innathyzit AKA Woodman

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    2 wires??? Hmmm only plugged in one.
    #83
  4. Padmei

    Padmei enamoured

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    yeah could be wrong - have been a lot lately.:D
    #84
  5. Box'a'bits

    Box'a'bits In need of repair

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    The main red cable that bolts into the starter motor, & a single black wire that comes up from the diode board. If you've not got that plugged in correctly, that'll be why your alternator isn't working
    #85
  6. innathyzit

    innathyzit AKA Woodman

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    Just checked the wiring the best I could and can't see anything obvious. Took the front cover of and looked at diode board and alternator and all seems ok there too.

    Don't have any testing gear or the knowledge of how to use it so will eat something and maybe that will fix it.
    #86
  7. Jwcasillas

    Jwcasillas Adventurer

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    Nice GSPD kick starters are great ESPECIALLY on airheads. Airheads have wimpy batteries and charging systems with massive and inefficient starters. Have an r90 myself and I just got done rebuilding me a tranny with a kick starter. My bike didn't come with one originally. They are useful if you are having problems and you don't want to kill your battery by using your starter. And they allow you to turn the motor easily for valve adjustment without spinning the rear wheel or pulling the front cover off and using an 8mm Allen.
    #87
  8. Jwcasillas

    Jwcasillas Adventurer

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    Does the light get brighter as you rev? If so it is a generator rotor most likely otherwise diagnose voltage regulator and diode board. If it is the diode board pm me so I can walk you through a rebuild
    #88
  9. Jwcasillas

    Jwcasillas Adventurer

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    Do you have a simple volt meter?
    #89
  10. Box'a'bits

    Box'a'bits In need of repair

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    Given you have just taken out & rebuilt the starter, then it should just be a case of re-inserting that, bolting it up, & replacing the wiring.

    Did you disconnect the battery negative before you took off the front cover? If you didn't there is a possiblity you may have fried the diodes. It only takes a light brush of the cover on the diode board to do so.

    I have to disagree with the prior poster. The alternator is adequate (but I have upgraded anyway), the valeo is a strong starter motor, & the batteries are large for the bikes. The kick starter is not only not necessary, but is a known weak point on the bikes. There is a world of difference between a late airhead, & a /6. The differences between Gus & my '78 RS are fairly major.
    #90
  11. Box'a'bits

    Box'a'bits In need of repair

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    Couple of pictures from the net. I'll correct myself. There are three wires. One red one from the diode board, a black one from the diode board, & a big one which goes out into the main wiring loom to the battery

    [​IMG]

    [​IMG]
    #91
  12. innathyzit

    innathyzit AKA Woodman

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    Its a new starter although I did buy a new magnet housing as well. It is wired correctly.Padmei advised me to disconnect the battery if removing front cover so i did.

    I did get the bolt on terminals on the old starter round the wrong way which caused a few sparks.

    How do I check if the diode board is fried? It looks ok. Bit of flaky paint on it though.

    Will get some meters today and figure out how to use them.
    #92
  13. Box'a'bits

    Box'a'bits In need of repair

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    If you disconnected first you are probably good. Here's a link to wade thru. Google is your friend
    #93
  14. Padmei

    Padmei enamoured

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    Can I politely enquire as to whether you have purchased a manual yet? It does help greatly. I'd help you but I'm off to Queenstown this weekend. You are most welcome to borrow my manuals spares etc if it helps. I don't think anything is broken on your electrics but something has been left off.

    with the alternator lite it isn't like a normal setup with 12v on one side of the lampholder & an earth (-) on the other. It is more like 12v on one side & 0v on the other.

    When the alternator charges - above 3K rpm- it supplies 12v to the 0v (-) side of the lampholder which cancels out the lite.
    when the revs drop so does the voltage on the 0v side causing a difference of 12v which makes the lamp come back on.
    #94
  15. innathyzit

    innathyzit AKA Woodman

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    That link may as well be written in Klingon. I am special needs when it come to tricity.

    No manual yet. You also speak Klingon.

    Have fun in Queenstown:bubba:bubba:bubba:bubba:bubba:drums
    #95
  16. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    Looking at a generic R100GS diagram the wire from the starter button goes on the solenoid and the main battery wire and the one to the diode board go on the large power terminal on the starter.
    Interesting with German stuff is the standard colour coding and numbering system.
    Heres a link showing what the color and terminal numbers mean.
    Common to all German vehicles
    http://www.google.co.nz/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=0CFEQFjAE&url=http%3A%2F%2Fwww.thesamba.com%2Fvw%2Farchives%2Finfo%2Fwiring%2FUnderstanding_Euro_Wiring_Diagrams_Motor_Magazine_April_2003.pdf&ei=FF79UsP1H8bRiAf32oGIAQ&usg=AFQjCNEC4a4g-gbVpKeRNr-gyUI4SqQ-tg&bvm=bv.61190604,d.aGc&cad=rja

    I'm a sparkie by trade but I learned all my auto wiring on VW's.
    Italian wiring is hard to fathom, British is even worse.
    Check that and if red light stays on we can go from there.
    As for Snowbums stuff my eyes glaze over.....mainly at the font, but its a good resource.
    #96
  17. innathyzit

    innathyzit AKA Woodman

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    Pretty sure I have fried a diode or two on the board when I hooked the starter up the wrong way. will get a new board and fit it up for peace of mind as I like the bike and intend keeping it. No rush.

    focus now is getting the KLR ready for the dustybutt which involves fitting the wheels and checking the oil, and maybe cleaning it.

    Macs Hoprocker is veeeery nice .
    #97
  18. Voltaire

    Voltaire Titanium and Ceramic Hipster

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    The two smaller wires that you had.
    One from the starter and one from the battery?
    Even if you got them mixed up its still only putting 12volts on the board.
    Check the brushes in the rotor are making contact.
    Before fitting a new diode board you need to be sure what caused it.
    (Oh dear I have been working for IBM for too long.... but when stuff fails at work we have to get a RCA, Root Cause Analysis )

    Epic Pale ale is my fav.
    #98
  19. innathyzit

    innathyzit AKA Woodman

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    Epic Pale Ale you say, That can be next Fridays box. Liked the Stoke IPA last week.

    I got me a multimeter so will do a few tests on the wiring this weekend, and check the rotor and brushes etc. Not gonna be a lot of time for shed stuff for the next few weeks.
    #99
  20. innathyzit

    innathyzit AKA Woodman

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    Anyone wanna buy a BMW? starting to get over this one. Starting to wonder what went through my mind when i bought it now.

    Found a dead diode on the diode board:clap so ordered a new board and new leads. Just fitted it and no friggen change,no friggen charge.

    Everything measures up good, but battery is a bit low at 12.45 volts but that shouldn't make it have no charge even when bypassing the regulator. Nothing,nada,nought.

    New battery tomorrow.

    Thinking of doing that thing where you pay someone to fix it?

    Fuck