Alternator dont Charge - red warning lights are on

[SJ]

Patient is 88 5kq

Symptoms:
Car was working fine on Thursday. Parked it in driveway at 4 PM.
Started raining like hell at 5 PM.
Started car at 6 PM. Moved car to end of driveway and about 4 red warning
lights came on, including the battery light. OK, been here before - broken
alternator belt. Parked car and took the 100q to appointment.

Today, I put car on ramps.
Started engine and tested voltage at the alternator.
Big post -> 12.0 volts
small post - blue wire -> 1.9 volts
Swapped out the Voltage Regulator with a known good one -- same symptoms.

Note: I had a similar alternator problem in June, but the problem 'fixed'
itself. I swapped out the Voltage Regulator and that fixed the problem. I
put back the original regulator, and alternator still worked!
I put in the new Voltage Regulator, and the car has worked fine since June.
The post is here
http://www.audifans.com/pipermail/quattro/2006-June/111074.html

Maybe these two problems are related somehow?

While I do some reading on the subject, I'll wait and see what suggestions
you guys come up with.

SJ
85 Dodge PU, D-250, 318, auto
85 Audi 4k - - sold but still on the road
88 Audi 5kq
90 Audi 100q




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