The W terminal is for the diesel tachometer.  The dynamic oil pressure
system will not work without it.  I doubt that the basic internal components
are different from the gas models.  The configuration of the case itself
comes in several different versions for different applications.  The one for
the diesel Vanagon (AL26) is unique.

Mike Snow

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM]On Behalf
> Of Jay L Snyder
> Sent: Monday, October 01, 2001 6:47 AM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Diesel Alternator Question
>
>
> What is different internally about the diesel alternators?  I have an '89
> Jetta diesel and the local FLAPS does not carry it.  I can get a
> Vanagon or
> gas jetta alternator off of the shelf.  What does the "W" wire
> do?  Is this
> for the Dynamic Oil Pressure System? If so, mine doesn't work anyway.  Is
> is a mounting configuration difference?  I had the original rebuilt, but
> may need something else in the near future.  It has bearing
> problems and is
> back at the "reubuilders" for a look-see.
>
>
>                                                              Jay