Piqued my interest.  Just what information does the VW stock 89 cruise control
get and where does it get it.  Motor speed via tachometer?  Driveshaft rotation?
How does it know how "fast" the venerable beast is going?  I recently had a
miserable experience with an alarm installer who botched a bunch of things on
the van.  Tach no longer works, speedo cable ripped off the speedo, broken tab
on the instrument cluster housing so the cover rattles etc etc.

And of course the autopilot doesn't work now.  So what should I check to see
what other damage they've done re the cruise control.  It would help if I knew
what signals the CC uses and from where they originate.

Any help is of course appreciated.

al_knoll@hp.com

89 Westie syncro