2003-2004 Audi TT Vehicle Wiring Chart and Diagram

PART	COLOR	LOCATION
12 VOLT CONSTANT	RED (+)	@ IGNITION SWITCH HARNESS
STARTER	RED/BLACK (+), See NOTE #1	@ IGNITION SWITCH HARNESS
STARTER 2	BLUE (+) or RED/BLACK (+), See NOTE #1	@ IGNITION SWITCH HARNESS
IGNITION 1	BLACK (+)	@ IGNITION SWITCH HARNESS
IGNITION 2	N/A
IGNITION 3	N/A
ACCESSORY/HEATER BLOWER 1	BLACK/RED (+)	@ IGNITION SWITCH HARNESS
ACCESSORY/HEATER BLOWER 2	N/A
KEYSENSE	N/A
PARKING LIGHTS ( - )	If Equipped with DRL, See NOTE #2	@ HEADLIGHT SWITCH, See DIAGRAM
PARKING LIGHTS ( + )	NOT equipped with DRL, See NOTE #2	@ HEADLIGHT SWITCH See DIAGRAM
POWER LOCK	PURPLE/GRAY to BROWN/YELLOW (TYPE B)	@ CENTRAL LOCKING CONTROL MODULE, C3 PIN 12, See NOTE #3
POWER UNLOCK	RED/GRAY ot GREEN/YELLOW (TYPE B) (Requires Double Pulse)	@ CENTRAL LOCKING CONTROL MODULE, C3 PIN 6, See NOTE #3
DOOR TRIGGER	See NOTE #4	@ CENTRAL LOCKING CONTROL MODULE C5 PINS 1 and 10, See NOTE #3
DOMELIGHT SUPERVISION	BROWN/WHITE (-)	@ CENTRAL LOCKING CONTROL MODULE C1 PIN 2, See NOTE #3
TRUNK RELEASE	PURPLE/GREEN (5-Wire), See NOTE #5	@ CENTRAL LOCKING CONTROL MODULE, C4 PIN 5, See NOTE #3
SLIDING POWER DOOR	N/A
HORN	BLACK/YELLOW (+)	@ HORN RELAY, UNDER DRIVERS SIDE of DASH
TACH	GREEN/BROWN (AC)	@ ECM, PIN 37, See NOTE #6
WAIT TO START LIGHT	N/A
BRAKE	RED/BLACK (+)	@ SWITCH ABOVE BRAKE PEDAL
FACTORY ALARM DISARM	DISARMS WITH UNLOCK, Single Pulse on UNLOCK wire, Disarms
ANTI-THEFT	AUDI'S TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #7	@ IGNITION SWITCH TUMBLER

EXTRA INFORMATION

NOTE #1: When Installing a REMOTE STARTER, you MUST use BOTH Starter #1 and Starter #2 wires. Both wires must be connected to the STARTER/CRANKING Output wire from the Remote Starter or the vehcile will NOT Remote Start when the Engine is cold. NOTE #2: On vehicles with DLR, use the GRAY/YELLOW (+) at the HEADLIGHT SWITCH, use a RELAY to isolate this wire use the DIAGRAM on the (-) PARKING LIGHTS INFO. On vehicles without the DRL, use the GRAY/BROWN and GRAY/PURPLE (+) wires at the HEADLIGHT SWITCH and use the DIAGRAM NOTE #3: The CENTRAL LOCKING CONTROL MODULE is located in the DRIVERS SIDE QUARTER PANEL in front of the FENDERWELL NOTE #4: The DRIVERS DOOR is a BROWN/YELLOW (-) and the PASSENGER DOOR is a BROWN/WHITE (-) both wires are at the CENTRAL LOCKING MODULE, when connecting to an ALARM SYSTEM use BOTH wires and DIODE ISOLATE See DIAGRAM NOTE #5: the TRUNK/HATCH Release system on this vehicle uses a 5-Wire Circuit and will require an extra Relay Part #775 to connect, See DIAGRAM NOTE #6: The ECM is located under the PLASTIC COVER on the FIREWALL under the hood. NOTE #7: AUDI'S TRANSPONDER ANTI-THEFT SYSTEM, Requires Bypass Module, Part # 791 Bypass and an extra ignition key for REMOTE STARTING ONLY to order, go to the SECURITY BYPASS MODULE Page on this website