John, actually the cruise control troubleshooting is in the Bentley.  It
is just a little tricky to find as it doesn't list it in the index at
the front of the book.  Look on page 27.25 and then it continues on from
there for several pages.  It is one of the best, step by step, easy to
understand and do, troubleshooting guides in the Bentley manual.

Usually I find that the problem is that one of the front vacuum switches
at the pedals is out of adjustment.  Check it with a vacuum tester and
if it doesn't hold vacuum then adjust it until it does and you are
golden.  If you can't get the switch to seal, pop it apart, lube up the
seal with some vasoline, and this should put you back on line.

Let me know if you need any more help or advice.

--
Thanks,
Ken Wilford
John 3:16
www.vanagain.com
Phone: 856-327-4936
Fax: 856-327-2242

On 3/5/2012 8:15 AM, John Graham wrote:
> My cruise control has 'gone away' and I don't know why yet.  There doesn't
> seem to be much info in the Bentley manual other than a section in the
> electrical wiring diagrams section.
> I have an automatic trans and years ago I had to replace the rubber bellows
> unit that pulls on the throttle, but that seems to be fine still.
>
> Is there some sort of troubleshooting guide that I haven't found yet
> somewhere?  I haven't done any work on the van recently that might have
> disturbed any connections that I know of.
>
> Any guidance or tips would be appreciated.
>
> John Graham
> '88 Westy
> Charlotte, NC
>