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Join Date: Jun 2008
Location: Leicester, U.K.
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Rev Counter Dances Or Doesn't Move At All.

Hi Guys.

I've had some weird charging issues lately.
Alternator warning light staying on and battery not charging.
For a while the light got brighter/dimmer with different revs but has been fully on lately. I changed the Voltage Regulator and now it's charging again but the warning light is still fully on.
I'm now getting the rev counter needle dancing around like crazy or not moving off its stop at all.

Any ideas?

Thank you.


Robert.
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Old 03-02-2014, 04:12 AM
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Location: Weehawken, NJ
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Probably there is something wrong with the alternator itself...one of the diodes is fried.

Went through the same thing on a friends car. Tried the "cheap" fix first and put in a voltage regulator. Light stayed on...wacky tachometer. Then replaced the whole alt, that did it
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Old 03-02-2014, 06:14 AM
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Quote:
Originally Posted by VonHanstein View Post
Hi Guys.

I've had some weird charging issues lately.
Alternator warning light staying on and battery not charging.
For a while the light got brighter/dimmer with different revs but has been fully on lately. I changed the Voltage Regulator and now it's charging again but the warning light is still fully on.
I'm now getting the rev counter needle dancing around like crazy or not moving off its stop at all.

Any ideas?

Thank you.


Robert.

How many volts? Over14?
Old 03-02-2014, 06:46 AM
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Thanks Jacob.

I was hoping for some better news
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Old 03-02-2014, 09:00 AM
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Hi Turbo Owner.

With the engine over 2000rpm meter shows 13.7-13.8v.
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Old 03-02-2014, 09:03 AM
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Hi Turbo Owner.

Should have mentioned that it's charging at idle too.
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Old 03-02-2014, 09:05 AM
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Quote:
Originally Posted by VonHanstein View Post
Hi Turbo Owner.

With the engine over 2000rpm meter shows 13.7-13.8v.
Not enough, you should have over 14 to be working properly.

I had the same problem when I replaced my voltage regulator, it must be energized to work properly.

I took my alternator to a shop after fighting the same problem, you can take the whole car too. Find a shop that works on alternators & generators or VW's they can fix it.
Old 03-02-2014, 09:22 AM
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