Re: Still Brake-Stumped

[a6561TB@gnn.com (Igor Kessel)]

Hi Al,

>7)  Does ANYONE have an idea what the vacuum port built into 
>this brake switch might do?

It disconnectes cruise control, when you brake
 
>8)  The brake pedal switch is set up to be OPEN (no circuit) when the 
>pedal is depressed, and to provide a complete circuit when the pedal 
>is released, closing the switch.  This seems totally wacky 
>to me.  Why wouldn't the brake lights be set up so the circuit is 
>completed when the pedal is pushed down, OPENING the switch????

Audi routinely uses the NORMALLY CLOSED SWITCHES for monitoring purposes, 
just to make the circuit fool-proof (i.e. if the switch terminals get 
disconnected from the harness accidently,the computer would treat it as a 
mulfunction). You will also find this setup in your front brake wear 
sensors.
 
>I think I'm confused.  I think I need large quantities of beer!!

Good idea. Always works for me.
While you are at it, I'll look @ the schematic diagram for you...
OK, tomorrow, its too late now.


Igor Kessel
'89 200TQ, chipped and MOMO'd through out,
in Tornado "arrest-me-officer" Red;
'88 Fox, "the FOX machine";
ex '85 5000s, "the EE's nightmare"
Phila PA, USA
a6561TB@gnn.com