Fw: Alternator dont Charge - red warning lights are on - FIXED

SJ syljay at optonline.net
Fri Nov 24 00:26:49 EST 2006

I replaced the alternator with a 100amp Bosch rebuilt unit. Price was $175
plus tax, and the old alternator core.

Before buying a replacement, I had the old alternator tested at two places.
The auto zone guy didnt know what the hell he was doing. I had to hook up
the cable adapters for him. Alternator read "dead as doorknob".
I also tested the old alternator at a auto electrical shop near me. It also
tested dead. The owner said it was most likely open stator winding(s).

I had tested the rotor winding by measuring the current going to them with
ignition key on. Current was 370 ma. Spec is about 175 ma. I tested the
rotor winding by measuring at the slip rings. I got a couple of ohms on the
rotor. I measured also from slip rings to ground . .. no shorts. I concluded
the rotor was probably ok, and the problem was with the stator.

I tried taking the alternator apart with no luck.
I removed the pulley.
Two bolt heads holding the cases together stripped out. I had to drill the
bolt heads off.
I couldnt pry the cases apart. The case material was chipping off and they
still would not seperate. I got some movement of the case halves but no
seperation. I guess 18 years of corrosion welded the case together.
I didnt want to damage the alternator anymore, fearing they wouldnt take it
as a good core. So, I wussed out and bought a rebuilt alternator.

Sorry guys . . .I failed . . . . .. I feel soooo bad about this . ..

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

----- Original Message ----- 
From: "SJ" <syljay at optonline.net>
To: <quattro at audifans.com>
Sent: Saturday, November 18, 2006 1:32 PM
Subject: Alternator dont Charge - red warning lights are on

> 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
> 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

No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.409 / Virus Database: 268.14.14/547 - Release Date: 11/22/2006

More information about the quattro mailing list