jumping tach

Discussion in 'Electrical' started by Baby Blue, Feb 26, 2011.

  1. Baby Blue

    Baby Blue Member

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    2002 HD Ultra Classic,anyone aware of why my tach starts jumping around after the bike has warmed up to running temp.? would this also effect the idle? as sometimes it does not drop to an idle. TY
     
  2. Jack Klarich

    Jack Klarich Expert Member

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    00-03 HD Codes And Activation - Page 6 - Harley Davidson Community have a look here first, then check for grounds and or pinched wires in the harness would be a good place to start IMO:s
     
  3. Baby Blue

    Baby Blue Member

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    could the cruise control module be the cause for this? also the engine light stays one
     
  4. glider

    glider Veteran Member

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  5. Baby Blue

    Baby Blue Member

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    we already did the codes, replaced the part it said it had the issue with, no change, the part was the iac
     
  6. Baby Blue

    Baby Blue Member

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    i have discovered that when I turn key on I have no oil light start bike and oil light flashs on and off with in a 2 second shut off motor and unplug wires from the back of tac turn key to run and oil light comes on gos out shortley after I start bike as it should also should the speedometer needle sweep the gage when I turn key on mine don't it goes back beyound o THANKS
     
  7. R_W_B

    R_W_B Senior Member

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    What kind of tach (and model) are you runnning. I have a Cobra Needle tach that does not jump much at all, but I've heard plenty of stories with the cheaper tachs that did have problems.

    When I get my Tbars, my cobra tach is coming off (since it's built into the bar clamp) and I'm gonna get one of those Dakota Digital plug and play console replacements with all the extra bells and whistles.

    I'm assuming you don't need to buy a single fire adapter for it ?
    Anyhow if it can be fixed these guys on here can help you find the problem.
     
  8. Baby Blue

    Baby Blue Member

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    tach is original, are all the idiot lights to come on in the dash when you turn the key on? and is the speedometer needle suppose to sweep the gauge or go backwords a little?
     
  9. lorne

    lorne Senior Member

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  10. Baby Blue

    Baby Blue Member

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    thanks for all the input, put a thundermax on and everything is great now