Buick  Century 2004-2005
 PART   COLOR  LOCATION
 12 VOLT CONSTANT   RED (+)   @ IGNITION SWITCH HARNESS
 STARTER  YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  WHITE to DARK GREEN (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  BROWN (+)  @ IGNITION SWITCH HARNESS
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  GRAY/BLACK (-)  @ BCM, PURPLE Plug, Pin A4, See NOTE #3
 PARKING LIGHTS ( + )  LIGHT BLUE (+) (Larger of the 2)  @ HEADLIGHT SWITCH, See NOTE #2
 POWER LOCK  RED/BLACK (TYPE B)  @ BCM, PURPLE Plug, Pin B6, See NOTE #3
 POWER UNLOCK  ORANGE/BLACK (TYPE B)  @ BCM, PURPLE Plug, Pin A6, See NOTE #3
 DOOR TRIGGER  DARK BLUE/WHITE (-)  @ BCM, PURPLE Plug, Pin A5, See NOTE #3
 DOMELIGHT SUPERVISION  USE DOOR TRIGGER  
 TRUNK RELEASE  WHITE (-)  @ BCM, PURPLE Plug, A7, See NOTE #3
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ BCM, LIGHT BLUE Plug, Pin A5, See NOTE #3
 TACH  PURPLE/WHITE or WHITE (AC)  @ IGNITION CONTROL MODULE
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   N/A  
 ANTI-THEFT  (2) WHITE wires in a ORANGE or BLACK heat shrunk tube in Steering column harness  GM's VATS System @ Ignition Switch
 EXTRA INFORMATION
 NOTE #1: If vehicle is equipped with PASSKEY/VATS, Ignition Key will have a little Chip on the Steel Shaft of the Key that can be seen. Requires 791 Bypass Module for Remote starting to order go to the SECURITY BYPASS MODULE Page on this website. NOTE #2: Use the Largest of the (2) LIGHT BLUE (+) PARKING LIGHT wires at the HEADLIGHT SWITCH. NOTE #3: The BCM is located to the LEFT of the STEERING COLUMN.