Green Neutral light not showing - so won't Start?

Discussion in 'Airheads' started by Steve_Col, Jun 9, 2012.

  1. Steve_Col

    Steve_Col Adventurer

    Joined:
    Mar 1, 2011
    Oddometer:
    13
    Green Neutral light not showing - so won't Start?
    GS100PD 1994
    Grrrrrrr
    Intermittent fault:
    Happened twice a couple months ago; got going with no repetition so I did nothing


    Happened again tonight :

    Happens when I pull up and Before switching off. I know I just clicked her up to neutral , yet the green light does not show.

    Later, I go to fire her up - no green light - no firing - no start.

    I rocked forth and back - hit into gear and out a coupla / few times - messed about with the switches ... Randomly the light came on and I was away.

    Late
    Cold - Icy ;

    Not Happy Irene.

    Any suggestions?
    (I have noticed the green light is slow to come on regularly ... as if there is 'lag' between hitting neutral and the sensor / machine mind catching on to that fact.)

    (copied from 'Old Skool')
    #1
  2. BEAMER89

    BEAMER89 Adventurer

    Joined:
    Jun 17, 2011
    Oddometer:
    14
    Location:
    Chrischurch New Zealand
    One of my bikes didnt have the neutral light, try holding the clutch in while giving the start button a blurp, should still start.
    #2
  3. Box'a'bits

    Box'a'bits In need of repair

    Joined:
    Sep 26, 2008
    Oddometer:
    3,143
    Location:
    Wellington, New Zealand
    The Neutral Switch sits at the low point of the gearbox. The switch can end up with sludge / water/ condensation around it, which will stop / slow it from functioning. Time for a gearbox oil change after a good fast run. Or to pull the switch out & replace it.

    The bike has a lock out function to stop you starting it in gear. Just pull the clutch in to start it if the neutral light doesn't show.
    #3
  4. SRanger331

    SRanger331 stuff

    Joined:
    Dec 10, 2011
    Oddometer:
    235
    Location:
    NW Ohio
    My wire came loose at the trans a few weeks ago. It was still in the hole, so sometimes it would make contact, sometimes not, which made the light act funny.
    #4
  5. Ray of Sunshine

    Ray of Sunshine Meat Donut 2 Some

    Joined:
    Feb 14, 2004
    Oddometer:
    16,906
    Location:
    42deg 40' 3"N 73deg 46' 54"W
    There are two neutral lock out switches: the primary is in the bottom of the transmission housing, where it is a PITA to get to. The second is fight above the gear lever. It sometimes fails as well.

    Usually, just pulling in the clutch lever will defeat these safety devices. :norton
    #5
  6. daveoneshot

    daveoneshot Been here awhile

    Joined:
    Dec 14, 2010
    Oddometer:
    465
    Location:
    Vermont
    Get the wires off the neutral switch with long nose pliers, and jump them together with wire and alligator clips, or something fabricated. Turn on the key, if you get your green light it's the neutral switch gone bad. Don't be a moron like me and try to jump the wires with a test light. That won't work. Keeping the wires jumped will get you a green light all the time.
    #6
  7. Padmei

    Padmei enamoured

    Joined:
    Mar 12, 2008
    Oddometer:
    4,099
    Location:
    Nelson New Zealand
    Huh??? :confused
    #7
  8. patanga

    patanga BMWAirheadsDownunder

    Joined:
    May 10, 2009
    Oddometer:
    161
    Location:
    Australia
    I'll second that :huh ???

    ____________________
    "The only reason people get lost in thought is because it's unfamiliar territory" (Joe Garcia)

    Feel welcome to check us out on facebook at "BMW Airheads Downunder", (The Australia and New Zealand Airhead Community). "B.A.D" :wink:
    http://www.facebook.com/groups/anzairheads/
    #8
  9. daveoneshot

    daveoneshot Been here awhile

    Joined:
    Dec 14, 2010
    Oddometer:
    465
    Location:
    Vermont
    Maybe he means clutch lever.
    #9
  10. Biebs

    Biebs BMW Airhead

    Joined:
    Mar 2, 2012
    Oddometer:
    608
    Location:
    Cave Creek AZ
    I have an 89 only starts in netural with the light on - will not start in gear with clutch lever pulled in. I thought this was a BMW by design feature. Are other's able to start their GS's in gear with clutch lever pulled in???? I may have a bad switch at the handlebar / clutch lever. Let hear from others.

    :freaky
    #10
  11. Dolly Sod

    Dolly Sod I want to do right, but not right now

    Joined:
    Aug 18, 2003
    Oddometer:
    15,094
    Location:
    Richmond, Va
    Switch might just need to be adjusted.
    #11
  12. lkchris

    lkchris Albuquerque

    Joined:
    Feb 23, 2005
    Oddometer:
    1,094
    Yes, just pull in clutch lever and bike will start.
    #12
  13. hardwaregrrl

    hardwaregrrl ignore list

    Joined:
    Jan 26, 2006
    Oddometer:
    8,144
    Location:
    Atlanta
    I had the safety switch on my ST. Couldn't start the bike in gear. No way! I jumped the clutch switch now I can start in any gear. I bet it's the neutral switch....the ONE and only under the trans
    #13
  14. ericrat

    ericrat Long timer

    Joined:
    May 18, 2007
    Oddometer:
    1,314
    Location:
    Cincinnati, OH
    Your clutch switch may not be working. I have a 78 so it is possible mine is different, but I don't think so. Also, I believe there is diode either in the headlight shell or near the starter relay too. I BELIEVE this keeps the clutch switch from back-feeding the neutral light or some-such, but will break the system if it goes bad.

    In short, I think your problem is fixable and worth investigating. It is a bummer to stall at a light, or climbing up out of a creek bed and have to shift instead of just pressing the button and getting back going.

    Eric
    #14