blue alternator wire/battery light/no voltage

[vince@performancecarstereo.com (Vince Royer)]

So does the blue wire go from the alt to the insrument panel or does =
it go
to the battery?  does the alternator send 12v down the blue wire, or =
does it
need to see 12 volts from the blue wire to work?

What if my blue wire is hanging unused because I thought it was only =
for the
alternator light?  (Thus I haven't hooked it up to anything yet)

Vince



-----Original Message-----
=46rom: scirocco-l-admin@scirocco.org
[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Brian Haygood
Sent: October 9, 2002 10:44 PM
To: rocco2nr@hotmail.com; scirocco-l@scirocco.org
Subject: Re: blue alternator wire/battery light/no voltage


I'm going through a little blue-wire thing myself.  Here are my tips:

Measure voltage between back of alt (big positive terminal nut) to al=
t body,
first with car off, then with it on.  If voltage is lower when on, al=
t is
not charging, but...

Run a wire from +12 terminal of battery to end of blue wire on alt.  =
Voltage
probably won't change until you rev the engine.  If your alt raises t=
he
measured voltage when you rev it a little, your alt is good to go.  I=
 have
to rev mine to ~3 grand at times for some reason.

If that does work, you have blue-wire blues of some form. With engine=
 not
running, but ignition on (don't know about ignition off) you should s=
ee +12v
at the end of the blue wire.  If not, check the connection at the pos=
itive
battery terminal.  If still no, check it at the instrument panel.  Th=
at's
all I know.

My alt needs the afore mentioned high revs to get excited, and my blu=
e light
doesn't work at all, though my blue-wire is consistently getting the =
needed
+12.  Not a very good combination. I'm still working on that.

BH


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