Basic facts on Bentley schematics:
If you look at the Bentley, they have different schematics for different circuits.
if you follow a harness line, and it ends in a number, you need to look at the bottom of the bentley page for the line of numbers, go forward or backwards until you see the number and that's where that wire went.
You are looking for the cruise control pedal and brake pedal sensors (there's a few), can't remember the pedal designation right now... they start with F
oh and it's measuring block 6
Group 006 (test with ignition switch on)
Speed
Brake pedal monitor
Cruise control system
Cruise control system (indicates if activated, 0 = activated but switched off, 1 = activated, swtiched on, 255 = not activated)
Cruise control system left digit: Clutch switch closed (clutch not depressed) = 0, 1 = clutch depressed
Cruise control system middle digit: CC/DFI brake pedal switch open (brake pedal depressed) = 1, 0 = pedal not depressed
Cruise control system right digit: brake light switch depressed pedal = 1, not depressed = 0
Right cruise control system 6 digit display has a 1, left to right, when:
Clutch operated
Brake pedal operated
Resume speed operated on the switch
Acceleration operated on the switch
Cruise control and memory switched off
Cruise controll system switched on
from this page:
http://forums.tdiclub.com/showthread.php?t=26762