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What can cause erratic tachometer?

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Old Apr 10, 2011 | 04:05 PM
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Default What can cause erratic tachometer?

I was out for a ride today & tach started to jump around & give erratic reading, then got a check engine light so I figured I better head for home. Bike is a 2000 FLHTCUI, when I got home I checked the trouble codes & got a #35, tachometer. The second question is can it cause any other problems with the running of the bike? I can live with a bad tach until I can get it fixed, I just don't want to get stranded. TIA
 
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Old Apr 10, 2011 | 05:42 PM
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Loose fitting, bad insulation on cable or the "dt's".
 
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Old Apr 10, 2011 | 06:21 PM
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I do not know the answer to your question or sure. But, in other applications than HD this symptom is caused by a failing/failed voltage regulator.
 
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Old Apr 10, 2011 | 07:34 PM
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Hoping maybe Dawg or somebody with some tech knowledge would see this.
 
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Old Apr 10, 2011 | 08:10 PM
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bad ground
 
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Old Apr 11, 2011 | 07:25 PM
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One more try.
 
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Old Apr 11, 2011 | 08:43 PM
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Loose battery terminals?
 
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