Audi 5000S Quattro not charging

[Brett Dikeman]

On Oct 10, 2005, at 3:06 PM, Kent McLean wrote:

> As for the not charging part, I think there is a blue wire
> to the alternator that tells it to alternate. Do a Google
> search on Audifans.com for: alternator blue wire. You'll
> get stuff like this:

The blue wire supplies field current to the alternator.  The voltage  
regulator reacts to main positive post voltage change by either  
allowing more or less current from the field wire into the system;  
the field takes the place of permanent magnets, thus the magnetic  
field is variable and stronger than it would be with (sufficiently  
inexpensive and small enough) permanent magnets.

Brett
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