Exactly, 'track number' is misleading.
Collum # is a better term.

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Mike S
Sent: Sunday, February 24, 2008 4:00 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Bentley wiring diagram. Questions on how to read.

At 01:10 AM 2/24/2008, neil N wrote...
>It was the track numbers at the end of certain wires at the bottom of
>the diagrams that was confusing me. Track number reference 69, is at
>end of a wire connected to S18. But when I turn the page and look at
>the end of wire from 69, it says 57. But one ignores that and looks up
>to the fuel pump and finds 42. Find 42 at bottom of previous diagram,
>ignore what we see at the end of *that* wire (which was the extra
>ground I was seeing) and look up to
>end of the original wire from S18, and see 69. I get it.

The track numbers are associated with the whole vertical "column," not
the end of the wire at the bottom. You're not really ignoring anything,
because the current track number isn't associated with "*that* wire,"
as you describe it. The numbers in the boxes tell you where a wire
connects to...the track numbers are only a reference to where that
connection can be found (like a page number).