[Vwdiesel] alternator/tach wire colors etc.

[Michael Smith]

Hi guys,
Just sent this to Nate, but decided to CC you all on it to. I'm stumped !

[>]
> Busy on my lunch hour but had another quick peek.
> THere are 2 wires coming from the alternator that are attached.
> LARGE RED (we know about this)
> Small bluish-green-turquiose colored one. (goes to a very small stud)
> On the harness leading up to the alternator there is also a small red with
> black tracer that looks like it's been cut, but may have been attached to
> the alternator at one point in time.  I missed it initially as it was
> flush with the sheathing the wires are in. I can't see anything on the
> alternator AFA "W" goes, or any extra connections that this red wire
> might've been attached to.
> I'm stumped !
>
>
> Mike Smith, CET
> Clinical Engineering Dept.
> River Valley Health, NB, Canada
> Phone (506) 452-5091
> r3mismith at health.nb.ca
> Fax (506) 447-4320
>
>
> -----Original Message-----
> From:	Nate Wall [SMTP:natewall1 at yahoo.com]
> Sent:	Tuesday, September 16, 2003 10:44 AM
> To:	Smith, Michael
> Subject:	RE: [Vwdiesel] FW: TACH stopped-88 Jetta Turbo Diesel mini
>
> Oh, there is another single thin wire that goes to the
> back of the alternator too, its the wire that supplies
> voltage to the regulator and rotor to magnetize it. It
> has a ring connector and is held on by an 8 MM nut.
> Its either blue or red w/ a white stripe. (I forget
> which is which color for those 2 wires!). Then there
> is the thick red wire that is directly connected to
> the battery that is the alternator output wire.
>
> --Nate
> --- Michael Smith <r3mismith at health.nb.ca> wrote:
> > Thanks NAte---I'll check the back of the alternator
> > at lunchtime today.
> > I had heard from different folks that they thought
> > it was a mechanical
> > tach....but now that I know it runs from a sensor in
> > the alternator, it
> > gives me a better idea what I'm up against !
> >
> > -Mike
> >
> > Mike Smith, CET
> > Clinical Engineering Dept.
> > River Valley Health, NB, Canada
> > Phone (506) 452-5091
> > r3mismith at health.nb.ca
> > Fax (506) 447-4320
> >
> >
> > > -----Original Message-----
> > > From:	Nate Wall [SMTP:natewall1 at yahoo.com]
> > > Sent:	Tuesday, September 16, 2003 10:21 AM
> > > To:	Smith, Michael; 'vwdiesel at vwfans.com'
> > > Subject:	Re: [Vwdiesel] FW: TACH stopped-88 Jetta
> > Turbo Diesel mini
> > >
> > > A good bet is a break near the female connector in
> > the
> > > "W" wire. A real easy fix. Its the single thin
> > wire
> > > that plugs into the back of the alternator and
> > there
> > > is a "W" stamped on the alternator case next to
> > it.
> > > Its the tach RPM signal wire. (I think its red w/
> > a
> > > white stripe) The diesel vibration over the years
> > can
> > > cause the wire to break, sometimes internally, so
> > you
> > > can't see it. In my case I had enough wire left to
> > cut
> > > the break out and resolder the same connector in
> > > place. Next bet would be a loose connector
> > connecting
> > > the instrument cluster (wiggle the connector(s)
> > with
> > > the engine running while watching the tach) or a
> > break
> > > in the thin flimsy circuit board in the instrument
> > > cluster (pull the cluster to check. Finally, I'd
> > swap
> > > out the tach if it still does not work.
> > > --Nate.
> > > --- Michael Smith <r3mismith at health.nb.ca> wrote:
> > > >
> > > > re:  Jetta Turbo Diesel
> > > >
> > > > > Hi All !
> > > > >
> > > > > Sending this from my work account, so if you
> > > > reply, please hit "reply all"
> > > > > or include ve9aa at nbnet.nb.ca in your reply, so
> > > > I'll see it at home too!
> > > > > I'm too cheap to buy a Bentley manual (at
> > least
> > > > until I decide I'm going
> > > > > to keep the car or not) so I need your folks
> > help.
> > > > >
> > > > > My tach finally quit after being intermittent
> > > > since I bought the car in
> > > > > March.  Sometimes it would go months w/o any
> > > > problems and other times it
> > > > > would "act up" for the first 15-20 minutes of
> > my
> > > > daily commute for 1-2
> > > > > weeks, then work 100% for many weeks
> > afterwards.
> > > > Problem is, I don't know
> > > > > what to look for.   Obviously, there's no coil
> > to
> > > > check wires on.  I
> > > > > really don't "need" a tach, but it sure is
> > nice to
> > > > have.
> > > > >
> > > > > What circuit should I be looking at, or is it
> > a
> > > > mechanical tach running to
> > > > > some gear off the crank or whatever??
> > > > >
> > > > > 1988 Jetta GL, 1.6L Turbo Diesel Canadian Car.
> > > > >
> > > > > Thanks much folks !
> > > > >
> > > > > Maybe I'll ask Santa for a "Bentley" (the
> > manual,
> > > > not the car, lol) if
> > > > > it's still on the road @ Xmas time.
> > > > >
> > > > > Mike Smith, CET
> > > > > Clinical Engineering Dept.
> > > > > River Valley Health, NB, Canada
> > > > > Phone (506) 452-5091
> > > > > r3mismith at health.nb.ca
> > > > > Fax (506) 447-4320
> > > > >
> > > > >
> > > > _______________________________________________
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> > > > vwdiesel at vwfans.com
> > > >
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> > >
> > >
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