Battery charging (blue wire again)

[deadbolt at mindspring.com (S. Coleman)]

Actually one of my newly learned "tricks" from the old German guy I work
with is that the alt will work without the blue wire hooked up if you crack
the throttle up above 3600 rpms.... I didn't believe it myself until he did
it to my 88 16V and my 78 8V..  As far as your jetta.... got me?
Chris
'88 16v Rocco
'78 8v Rocco
'80 Caddy
'92 SLC
'02 337 1.8T
'00 GTI VR6
'97 Golf GL
----- Original Message -----
From: "Euroroc II" <flaatr@yahoo.com>
To: <Scirocco-l@scirocco.org>
Sent: Monday, July 07, 2003 9:51 PM
Subject: Battery charging (blue wire again)


> So here is an interesting question...
>
> I understand that the blue wire runs from battery (+), through instrument
> panel/warning light, and on to the alt.  It brings +12v to the alt.  The
> current from this wire is used to get the alt going, called "exciting" the
> circuit.  Without an initial current like this the alt will never get
> going.  It's a good bit like priming a pump (plagiarized from a previous
post).
>
> So why does my A2 Jetta start up and charge without the need to rev the
> motor up to get the excitation voltage my Scirocco requires. I don't have
> the Bentley for the Jetta yet to see if there are any differences but it
> looks like the same alternator and basically the same instrument cluster
>
> -Raffi
> .
>
>
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