Battery charging (blue wire again)

[amalventano at sc.rr.com (Allyn)]

the circuit in the cluster may have gotten inductively kicked enough times
(from shutting off the engine), to weaken/degrade it. this would prevent
enough current from getting to the alternator to flash the field. also, the
wire may just be old. every blue wire i have ever looked at has looked like
crap (on a1's at least).
Al

----- 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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