This is from bulldogsecurity.com
TT 2005-2006
AUDI'S TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #1
PART COLOR LOCATION DIAGRAM
12 VOLT CONSTANT RED (+) @ IGNITION SWITCH, (8-PIN PLUG), PIN 3
STARTER RED / BLACK (+) @ IGNITION SWITCH, (8-PIN PLUG), PIN 5
STARTER 2 RED / BLACK (+) @ IGNITION SWITCH, (8-PIN PLUG), PIN 1
IGNITION 1 BLACK (+) @ IGNITION SWITCH, (8-PIN PLUG), PIN 6
IGNITION 2 N/A
IGNITION 3 N/A
ACCESSORY /HEATER BLOWER 1 BLACK/ RED (+) @ IGNITION SWITCH, (8-PIN PLUG), PIN 2
ACCESSORY /HEATER BLOWER 2 N/A
KEYSENSE N/A
PARKING LIGHTS ( - ) N/A
PARKING LIGHTS ( + ) GRAY/BROWN(+)(Left) and GRAY/PURPLE(+)(Right) use both and Isolate, NOTE #2 @ HEADLIGHT Switch, (17-PIN PLUG), PIN 13 and 14
POWER LOCK BLUE/GREEN (TYPE B) in DRIVERS KICK PANEL or CLCM, (20-PIN PLUG), PIN 14, NOTE #3
POWER UNLOCK GREEN / WHITE (TYPE B) in DRIVERS KICK PANEL or CLCM, (20-PIN PLUG), PIN 12, NOTE #3
LOCK MOTOR WIRE N/A
DOOR TRIGGER GREEN/ YELLOW to BROWN / YELLOW (-) in DRIVERS KICK PANEL or CLCM, (16-PIN PLUG), PIN 1, NOTE #3
DOMELIGHT SUPERVISION BROWN / WHITE (-) @ CLCM, (12-PIN PLUG), PIN 2, NOTE #3
TRUNK RELEASE PURPLE / GREEN (5-Wire Type) @ RELEASE Switch or CLCM, (20-PIN PLUG), PIN 5, NOTE #3
SLIDING POWER DOOR N/A
HORN BLACK / YELLOW (+) @ DRIVERS DASH RELAY PANEL
TACH Any wire with a PURPLE STRIPE, (AC) @ Any FUEL-INJECTOR
WAIT TO START LIGHT N/A
BRAKE RED / BLACK (+) @ BRAKE PEDAL Switch, (4-PIN PLUG), PIN 4
FACTORY ALARM DISARM RED / GRAY to GREEN/ YELLOW (-) (Requires Double Pulse) in DRIVERS KICK PANEL or CLCM, (12-PIN PLUG), PIN 6, NOTE #3
ANTI-THEFT AUDI'S TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #1 @ IGNITION SWITCH TUMBLER
NOTES
NOTE #1: AUDI'S TRANSPONDER ANTI-THEFT SYSTEM, Requires Bypass Module,
NOTE #2: on Vehicles with DRL, it is GRAY / YELLOW (+) at the HEADLIGHT SWITCH, (17-PIN
PLUG),PIN 6, you will need to RELAY ISOLATE the switch so that it does not backfeed
to the Ignition
NOTE #3: the CLCM, (Central Locking Control Module) is located in the LEFT REAR Side Panel.
~wirewise~
Verify all wiring with your meter before making any connections!