Vehicle
Wiring Details for your
2005-2008 Buick Lacrosse 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 2005-2008 Buick Lacrosse . 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.
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| PART |
COLOR |
LOCATION |
| 12 VOLT
CONSTANT |
RED (+) |
@ BATTERY or FUSE BOX |
| STARTER |
YELLOW (+) |
IGNITION SWITCH HARNESS or BCM, C1, Pin 21 See NOTE #2 |
| STARTER
2 |
N/A |
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| IGNITION
1 |
PINK (+) |
IGNITION SWITCH HARNESS or BCM, C1, Pin 22 See NOTE *1 |
| IGNITION
2 |
N/A |
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| IGNITION
3 |
N/A |
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| ACCESSORY/HEATER
BLOWER 1 |
BROWN (+) |
IGNITION SWITCH HARNESS or BCM, C1 Pin 23 See NOTE #2 |
| ACCESSORY/HEATER
BLOWER 2 |
N/A |
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| KEYSENSE |
N/A |
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| PARKING
LIGHTS ( - ) |
BROWN/WHITE (-) |
@ BCM, C3 Pin 8, See NOTE #2 |
| PARKING
LIGHTS ( + ) |
BROWN (+) |
@ FUSE BOX or PASSENGER KICK PANEL, Harness to REAR of VEHICLE. |
| POWER LOCK |
RED/BLACK (TYPE B) |
@ BCM, C2 Pin 2, See NOTE #2 |
| POWER UNLOCK |
ORANGE/BLACK (TYPE B) |
@ BCM, C2 Pin 11, See NOTE #2 |
| DOOR TRIGGER |
See NOTE #3 |
@ BCM, C2, See NOTE #2 |
| DOMELIGHT
SUPERVISION |
GRAY/BLACK (-) |
@ BCM, C1 Pin 43, See NOTE #2 |
| TRUNK RELEASE |
LIGHT BLUE (+) |
@ BCM, C2, Pin 45, See NOTE #2 |
| SLIDING
POWER DOOR |
N/A |
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| HORN |
BLACK (-) |
@ BCM, C1 Pin 4, See NOTE #2 |
| TACH |
ANY wire NOT PINK or WHITE (AC) |
@ ANY FUEL-INJECTOR |
| WAIT TO
START LIGHT |
N/A |
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| BRAKE |
WHITE (+) |
@ BCM, C2 Pin 30, See NOTE #2 |
| FACTORY
ALARM DISARM |
PURPLE (-) |
@ BCM, C2 Pin 24, See NOTE #2 |
| ANTI-THEFT |
GM'S TRANSPONDER ANTI-THEFT SYSTEM, See NOTE #1 |
@ IGNITION SWITCH TUMBLER |
| EXTRA
INFORMATION |
| NOTE #1: This vehicle is equipped with GM's TRANSPONDER ANTI-THEFT System and will require
part #791 BYPASS MODULE and an extra ignition key for Remote Starter Operation.
To order go to the SECURITY BYPASS MODULE Page on this website.
NOTE #2: the BCM is located to the LEFT of the STEERING COLUMN, C1 is a BLACK 52-Pin plug,
C2 is a BLACK 52-Pin plug, and C3 is a BLACK 18-Pin plug.
NOTE #3: the DRIVERS DOOR is a GREY/BLACK (-) Pin 26, the PASSENGER DOOR is a
BLACK/WHITE (-) Pin 17, the DRIVERS REAR DOOR is a BLUE/BLACK (-) Pin 7 and
the PASSENGER REAR DOOR is a LIGHT GREEN/BLACK (-) Pin 5 when connecting to an
Alarm System use all 4 wires and DIODE ISOLATE, See DAIGRAM
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