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I have a 1998 jetta tdi and recently my speedometer started to act up.It would jump up and down then go to zero.It would stay like that sometimes for a day, sometimes only for a few minutes,i guess it has a mind of it's own.

Any ideas?

Thanks,Nebojsa
 

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23,902 Posts
Low voltage? Perhaps the alternator pulley clutch is going bad? To test, remove the serp belt and use a wood stick to hold the fan inside, the pulley should only rotate 1 way. Bad voltage regulator?

Bad cluster? Water damage in interior? Bad grounds?
 
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