[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index] re:CRUISE CONTROL
afinney@tamsconsultants.com asks: << What I'm wondering is why the plunger switches on the clutch and brake interupt the flow of power to terminal 3 of the control unit. The switches don't even see power until the brake pedal is depressed and power is sent to the brake lights. So what is the point of then interupting this flow if it was only just initiated? >> I was wondering the exact same thing on my '88 90Q. It sounds like the cruise control circuit is pretty much the same for all Audi's of this period. I posted this same question to the list last week and got a very good answer from Joe Yakubik, who's been struggling with his CC on his 200. Basically, the gist is that the switches find a ground path thru the brake lamp module (of thru the lamps themselves, if you don't have a module). The CC module is looking for a connection to ground, not +12V. Pretty perverse, eh? I'm not sure why Audi did it this way, instead of going directly to ground or +12V, like one would expect. -steve -- Steve Valin http://reality.sgi.com/steve_engr steve@sgi.com "Time wounds all heels" -Crackerbash
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