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Tach Going Haywire - Ideas?

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Old Jul 25, 2025 | 01:13 PM
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Default Tach Going Haywire - Ideas?

So I have this speedo/tach combo on my 2005 FXST. The tach has been acting wacky for a few years now (speedo works fine), but I haven't been incredibly concerned about it. Used to work fine but then one day it just started doing whatever it wants.

Does anyone know if this is a serviceable unit? Or is there a sensor somewhere that I need to check? There's newer and nicer ones on the market these days, obviously, but I like the look of this one
 
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Old Jul 25, 2025 | 01:18 PM
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Check your ground wire connection and tighten both battery terminals. Electronic tachs, speedos are very sensitive to corrosion or loose connections.
 
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