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Thread: xb9 tach not working

  1. #1
    Junior Member
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    Hello,

    I recently purchased a 2005 xb9 and it is my first Buell . The tach does not work. It does not "sweep" with the speedo when I turn the key on. I've searched the forum and have been unable to find any information. Any help would be greatly appreciated.

    Thank you in advance.

    Scott

  2. #2
    Senior Member squidbuellie's Avatar
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    Sounds like a bad speedo... How many miles does your bike have?

  3. #3
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    11,750 miles. When you say bad speedo do you mean the whole speedometer/tachometer unit will need to be replaced? Can it be taken apart and fixed? The tach is the only thing not working.

  4. #4
    Senior Member Cooter's Avatar
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    I have a working gauge cluster that is apart right now. I can look at it tomorrow and see if the tach portion would be easy to swap. Otherwise, you have to buy a whole new dash (with similar miles).

  5. #5
    Senior Member thrstrmech's Avatar
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    have you checked for a code, if so you should get 35. check the accessory, battery and key switch fuses. key on perform wiggle test at instrument cluster, checking that the connector is properly installed prior to wiggle test. check the speed sensor connector under pulley cover for corrosion, being dirty, and or proper connection. also check your battery connections and ground for security. you could have one or more of these issues: poor connections, battery ground issue, faulty cluster, faulty ecm, faulty speed sensor, bad fuses. look for root cause and avoid band aid fixes.

  6. #6
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    Thank you for your responses. I will check all the connections. The only needle that sweeps is the speedo when the key is turned on which makes me wonder if it is internal to the gauge cluster.

  7. #7
    Senior Member Cooter's Avatar
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    The only needle that sweeps is the speedo when the key is turned on which makes me wonder if it is internal to the gauge cluster.
    The whole gauge cluster is powered by one wire, so I'd have to agree with that.

    Even if your battery, ground, harness, speed signal wire, tach signal wire, fuse, or ECM are all bad, it would still sweep with the speedo.

  8. #8
    Senior Member ToneTheMoan's Avatar
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    Check if the needle has been pushed down? it dont take much pressure for that to happen and stop it moving!

  9. #9
    Senior Member Cooter's Avatar
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    True ^^^^

    If that doesn't fix it, it will already be out of the bike. Since the entire thing is solid state except the motors, odds are it's the tach stepper motor that drives the needle that's bad.

    The back of the circuit board looks like this.

    The stepper motor for the tach is directly under the needle (duh). The 4 terminals are power, ground, step up, and step down (The pointy silver things just above CL32 in a square shape) Plug it back into the bike, key on, and use a DVOM to test you have at least one (+) and one (-). If you don't, you need a whole new board.

    If you DO have a (+) and a (-) on 2 of the terminals, the stepper motor is bad. Unscrew the black screw next to that motor


    And the screw next to the speedo stepper motor


    Remove the needles by pulling up with you fingers on the center pivot, and pull off the face plate.


    On the back side of the tach stepper motor, bend up the 4 tabs (near CL33 and CL38), and unsolder the 4 terminals directly inside the tabs… solder on the new one and test!

    I have a whole completely functioning cluster board if you need it. PM me.

  10. #10
    Senior Member ToneTheMoan's Avatar
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    Great info cooter that may help me too in the future!



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