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Discussion in 'Motorcycle Tech Talk' started by lwedwards, Aug 26, 2010.

  1. lwedwards

    lwedwards Active Member

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    THe bike quite today going down the road, all gauges went blank, lights went out complete shutdown. Checked all the fuzes and not the problem. Battery shows 12.75 volts. Anyone have a guess as to what went wrong.2002 Ultra Classic, thundermax ecm, 95 big bore kit.:banghead:
    lwedwards, Aug 26, 2010
    #1
  3. chucktx

    chucktx Moderator Staff Member

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    is there power to the fuses? if not check the main breaker, check the battery grounds and pos cable on battery. let us know.....
    chucktx, Aug 26, 2010
    #2
  4. FLHTbiker

    FLHTbiker Moderator Staff Member

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    I had a positive battery bolt come loose once and it did the same thing, so like Chuck said check pos and neg connections.
    FLHTbiker, Aug 26, 2010
    #3
  5. lwedwards

    lwedwards Active Member

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    The connections were all tight at the battery. Not sure where the main breaker is. My manual is at home right now.
    lwedwards, Aug 26, 2010
    #4
  6. chucktx

    chucktx Moderator Staff Member

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    make sure connections are tight at the frame(ground) use a test light to see if there is power to the fuses, then check the main breaker....i dont know where it is on your bike but the manual will show it.
    chucktx, Aug 26, 2010
    #5
  7. cowboy

    cowboy Moderator Staff Member

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    Ya what he said , If that all check's out good look for a fraid wire like under the tank/ seat just might have one rub raw Good luck
    cowboy, Aug 26, 2010
    #6
  8. FLHTbiker

    FLHTbiker Moderator Staff Member

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    You could also have a battery cable that has corroded inside, has happened. Good Luck.
    FLHTbiker, Aug 26, 2010
    #7
  9. Lucifer

    Lucifer Well-Known Member

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    Check the line side of your ignition switch for juice...if none it's between there and the battery...if you have power on the line side turn the switch on and check the load side for juice.If none it's the switch, if there is power keep going forward until there is none.
    Lucifer, Aug 27, 2010
    #8
  10. lwedwards

    lwedwards Active Member

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    Put multimeter on today, checked voltae from battery to starter 12.84 volts, checked across studs on main circuit breaker first time 4.87 volts, went from battery to copper stud 12.84 volts, battery to second stud 12.84 volts, across studs now 12.84 volts. Turned on ignition switch everything works. Sounds like main circuit breaker going bad, does this sound right?

    THanks, :wtf:
    lwedwards, Aug 27, 2010
    #9
  11. hotroadking

    hotroadking Super Moderator Staff Member

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    Could be hd replaced that with the Maxi Fuse 40 amp main fuse, you might consider doing the upgrade and dumping the breaker

    Usually the breaker trips and then comes back and the bike will restart once it cools

    You can get the breaker at any auto parts store BTW so you don't have to pay dealer prices.
    hotroadking, Aug 27, 2010
    #10
  12. chucktx

    chucktx Moderator Staff Member

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    if you put jumper cables across the posts do ya get power??? if so, replace it......and as said....auto parts is your place for fuses,bulbs,breakers.........
    chucktx, Aug 27, 2010
    #11
  13. lwedwards

    lwedwards Active Member

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    When I pulled the breaker out it fell apart. The dealer would have been a better deal in this case their price was $4.99 not in stock, NAPA Auto Parts $7.99 oh well. Bike isback to normal. Thanks to everyone.:)
    lwedwards, Aug 27, 2010
    #12
  14. FLHTbiker

    FLHTbiker Moderator Staff Member

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    Good to hear you got it working.
    FLHTbiker, Aug 27, 2010
    #13
  15. cowboy

    cowboy Moderator Staff Member

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    If dealer had to order & napa had it the few extra bucks is well worth it cause your up & running :D
    cowboy, Aug 27, 2010
    #14
  16. lwedwards

    lwedwards Active Member

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    That's`what I thought Cowboy. Anyday riding is better than sitting and waiting.:D
    lwedwards, Aug 28, 2010
    #15
  17. cardboard

    cardboard Well-Known Member

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    Glad you found the problem. Git a extra.


    Notised you had a Thundermax. When the Thundermax was installed, did they use Dialetic grease on all the Electrical connections ?
    cardboard, Aug 29, 2010
    #16
  18. lwedwards

    lwedwards Active Member

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    Cardboard, I put it on my self and I forgot about the grease. Thanks,
    lwedwards, Aug 30, 2010
    #17
  19. hotroadking

    hotroadking Super Moderator Staff Member

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    Glad that worked out for you.

    Next time at the dealer ask about the 40 Amp Maxi Fuse
    they may have an upgrade kit, gets rid of the breaker,
    hotroadking, Aug 30, 2010
    #18
  20. cardboard

    cardboard Well-Known Member

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    So how long have you had the TM and how do you like it , if I may ask ?:D
    cardboard, Aug 30, 2010
    #19
  21. lwedwards

    lwedwards Active Member

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    Cardboard, I've had it on five months now and I love it. The idle is a lot smoother and it starts up real quick. The mileage has gone up and there is no hesitation or pinging. I always had backfiring on decel and the heat was bad with the true duals and FuelPac and i could never get it just right. Now I just ride and let the thundermax make the changes and update the learned changes after a long ride.:D
    lwedwards, Aug 31, 2010
    #20

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