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Vehicle Wiring Details for your
2004-2005 Buick Lesabre Wiring Diagram
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Listed below is the vehicle specific wiring diagram for your car alarm, remote starter or keyless entry installation into your 2004-2005 Buick Lesabre . This information outlines the wires location, color and polarity to help you identify the proper connection spots in the vehicle. Please be sure to test all of your wires with a digital multimeter before making any connections. More information on using a multimeter and testing wires please see our Technical Support Area.

 PART   COLOR  LOCATION
 12 VOLT CONSTANT   Connect to BATTERY ONLY  
 STARTER  YELLOW (+)  @ IGNITION SWITCH HARNESS
 STARTER 2  N/A  
 IGNITION 1  PINK (+)  @ IGNITION SWITCH HARNESS
 IGNITION 2  WHITE (+)  @ IGNITION SWITCH HARNESS
 IGNITION 3  N/A  
 ACCESSORY/HEATER BLOWER 1  ORANGE (+)  @ IGNITION SWITCH HARNESS
 ACCESSORY/HEATER BLOWER 2  N/A  
 KEYSENSE  N/A  
 PARKING LIGHTS ( - )  BROWN/WHITE (-)  @ DIM Module, BROWN Plug, Pin 3, See NOTE #1
 PARKING LIGHTS ( + )  PURPLE (+) and BROWN/WHITE (+) Use both, See NOTE #1  @ REAR FUSE BLOCK, under drivers side rear seat.
 POWER LOCK  RED/BLACK (TYPE B)  @ DRIVERS DOOR LOCK SWITCH in drivers door
 POWER UNLOCK  ORANGE/BLACK (TYPE B)  @ DRIVERS DOOR LOCK SWITCH in drivers door
 DOOR TRIGGER  TAN (-) and DARK BLUE (-) Use both wires, See NOTE #3  IN EACH DOOR MODULE, See NOTE #2
 DOMELIGHT SUPERVISION  GRAY (-), (Requires #775 Relay)  @ UNDER DASH LIGHT
 TRUNK RELEASE  LIGHT BLUE (-)  @ RIM Module, BLUE Plug, Pin B4, See NOTE #3
 SLIDING POWER DOOR  N/A  
 HORN  BLACK (-)  @ DIM Module, GREY Plug, Pin A6, See NOTE #1
 TACH  WHITE (AC)  @ PCM See NOTE *4
 WAIT TO START LIGHT  N/A  
 BRAKE  WHITE (+)  @ SWITCH ABOVE BRAKE PEDAL
 FACTORY ALARM DISARM   LIGHT GREEN (-)  IN DRIVERS DOOR MODULE in DOOR
 ANTI-THEFT  GM's PK3 TRANSPONDER ANTI-THEFT System, See NOTE #6  @ IGNITION SWITCH TUMBLER
 EXTRA INFORMATION
 NOTE #1: the PARKING LIGHTS on this vehicle are a 2-Wire System that will require 2 extra Relays part #775 to connect, See DIAGRAM NOTE #2: the DIM Module is located just in front of the blower motor near the passenger kick panel. The DIM Module has (3) connectors that all exit out the bottom of the module. NOTE #3: the TAN (-) is for the DRIVERS DOOR located in the DRIVERS DOOR HARNESS. The DARK BLUE (-) is for all other doors and is located LOW in the DRIVERS KICK PANEL. NOTE #4: the RIM Module is located behind the rear seat in the upper corner on the drivers side. NOTE #5: the PCM is located under the hood inside the AIR CLEANER BOX, the TACH wire is in the CLEAR Plug Pin 8. NOTE #6: Equipped with GM's PK3 TRANSPONDER ANTI-THEFT System Requires part # 791 BYPASS MODULE and an extra ignition key for Remote Starting operation to order go to the SECURITY BYPASS MODULE Page on this website.
 
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