Al, >Piqued my interest. Just what information >does the VW stock 89 cruise control >get and where does it get it. >Motor speed via tachometer? NO >Driveshaft rotation? NO >How does it know how "fast" the venerable >beast is going? There is an inductive pick-up behind the speedo. If you open the dash board cover, on right side of the speedo back panel you will find a small item screwed onto the panel. Two wires are attached to it. It takes the rotation of the magnetic ring which regularly drives the speedo pointer. >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. The CC uses the speedo pick-up, two switches from clutch and brake paddle, and the control stick switches as input. Output is three wired to a vacuum pump in the engine compartment. >Any help is of course appreciated. On my experience, Audi is using exactly same cruise control in Audi 5000. Helmut '80 Vanagaudi |
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