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BUICK CENTURY
MODEL YEAR(S
CENTURY 2004-2005
KEY T-HARNESS IMMOBILIZER
N/A N/A GM's VATS ANTI-THEFT System, See NOTE #1
PART COLOR LOCATION DIAGRAM
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
LOCK MOTOR WIRE GRAY (5-WIRE TYPE) @ BCM, CLEAR Plug, Pin G, 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
NOTES
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.
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