Audi  S4 2002-
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  RED/BLACK (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  BLACK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  N/A  
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  YELLOW/BLACK (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  N/A  
 PARKING LIGHTS ( + )  GRAY/BLACK (+) and GRAY/RED (+) Use both, See NOTE #1  @ HEADLIGHT SWITCH See DIAGRAM
 POWER LOCK  BROWN/GRAY or RED/BROWN (TYPE B)  IN DRIVER KICK PANEL or FACTORY SECURITY MODULE, See NOTE #2
 POWER UNLOCK  GRAY/WHITE (TYPE B) (Requires Double Pulse)  IN DRIVER KICK PANEL or FACTORY SECURITY MODULE, See NOTE #2
 DOOR TRIGGER  SEE NOTE #3  @ DOOR PIN SWITCH, See DIAGRAM
 DOMELIGHT SUPERVISION  BROWN/YELLOW (-)  IN DRIVERS KICK PANEL
 TRUNK RELEASE  YELLOW/RED (+)  @ TRUNK RELEASE SWITCH
 SLIDING POWER DOOR  N/A  
 HORN  BLACK/YELLOW (-)  @ HORN RELAY
 TACH  GREEN/BLUE (AC)  @ ECM, DRIVER SIDE FIREWALL
 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 #4  @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE #1: this vehicle has 2 PARKING LIGHT wires, to connect will requires 2 extra relays part #775, See DIAGRAM NOTE #2: the FACTORY SECURITY MODULE is located at the BOTTOM of the TRUNK on the PASSENGER SIDE. NOTE #3: the DRIVERS DOOR is a BROWN/YELLOW (-) in the DRIVERS KICK PANEL, the BROWN/WHITE (-) is in the PASSENGER KICK PANEL and is for all other doors. When connecting to an ALARM SYSTEM use both wires and DIODE ISOLATE See DIAGRAM NOTE #4: 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