blue alternator wire/battery light/no voltage

[ralexander03@snet.net (Rick Alexander)]

Patrick said, "I would test the alternator at the alternator terminal
before making such an assumption, it is simply possible
your gauge is dead."

He's some what right.

Dave said, "While the car is running, check the voltage at the battery
(across the
terminals).  If it is about 13v (13.5-14 is best) then your good!  I realize
the blue wire goes to the gauge but it is actually the field wire--it tells
the alternator to charge.  HTH!"

He's also somewhat right.

The blue wire comes from the gauge. With only 1.3v on the blue wire your
alternator will not charge. It needs a dozen or so volts to excite the
alternator coils. Find out why you only have 1.3v and your gauge will work
and the alternator will charge.

Rick Alexander
http://www.brubakerbox.com
http://clubs.hemmings.com/hams/
http://clubs.hemmings.com/vwsrus/

----- Original Message -----
From: "Joe Doty" <rocco2nr@hotmail.com>
To: <scirocco-l@scirocco.org>
Sent: Tuesday, October 08, 2002 12:55 AM
Subject: blue alternator wire/battery light/no voltage


> Okay, I have a steady battery light in the gauge cluster, no voltage on my
> gauge (reading from the same place as the little blue wire on the
> alternator).  I get about +1.3 volts from that terminal to ground when the
> car is running.  Is my alternator pretty much toast?
>
> Joe
>
>
>
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