Buick LaCrosse mk2 (Second Generation; 2011- 2012) – fuse box diagram

Buick LaCrosse mk2 (Second Generation; 2011 – 2012) – fuse box diagram

Year of production: 2011, 2012

Engine Compartment Fuse Block

Buick LaCrosse - fuse box - engine compartment
Buick LaCrosse – fuse box – engine compartment
J-Case Usage
6 Wiper
12 Starter
21 Rear power windows
22 Sunroof
24 Front power windows
25 Rear heated seats
26 Antilock brake system pump
27 Electric parking brake
28 Rear window defogger
41 Brake vacuum pump
42 Cooling fan K2
45 Cooling fan K1

 

Mini Fuses Usage
1 Transmission control module–battery
2 Engine control module battery
3 Air Conditioning Compressor Clutch
5 Engine control module/Run/Crank
7 Long range radar/ Front camera
8 Ignition coils–even (6–cylinder engine)/ Ignition coils–all (4–cylinder engine)
9 Ignition coils–odd (6–cylinder engine)
10 Engine control module–switched battery
11 Post Catalytic Converter Oxygen Sensor Heate
13 Trans Ignition/Fuel System Control Module
16 MAF
17 Airbag Module
18 SBZ Ignition
23 Variable Effort Steering
29 Power Lumbar, Left
30 Heated Seat/Right power pack cooling fan (eAssist)
32 Body control module
33 Heated Seat
34 Antilock brake system valves
35 Amplifier
36 AFL Ignition
37 Right high-beam
38 Left high-beam
46 Cooling fan relay
47 Pre Catalytic Converter Oxygen Sensor Heater
48 Fog lamps
49 Right High Intensity Discharge Headlamp
50 Left High Intensity Discharge Headlamp
51 Horn
52 Cluster Ignition
53 Inside Rearview Mirror, Rear Vision Camera, Vacuum Pump
54 Heating, Ventilation and Air Conditioning
55 Outside Rearview Mirror, Universal Garage Door Opener, Window Switch
56 Windshield washer
60 Heated mirror
62 Canister vent
64 AFL Battery
65 Theft‐Deterrent Horn
67 Fuel pump power module
69 Regulated voltage control sensor
70 Parking assist/Side blind zone

 

Mini Relays Usage
7 Engine control module
9 Cooling fan
13 Cooling fan
15 Run/Crank
17 Rear window defogger

 

Micro Relays Usage
2 Starter
4 Wiper speed
5 Wiper control
10 Cooling fan
14 Headlamp low-beam

 Instrument Panel Fuse Block

The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.

Buick LaCrosse - fuse box - instrument panel
Buick LaCrosse – fuse box – instrument panel
Fuses Usage
1 Steering Wheel Controls Backlight
2 Body control module 7
3 Body Control Module 5
4 Radio
5 OnStar/Universal hands–free phone
6 Power outlet 1
7 Power outlet 2
8 Body control module 1
9 Body control module 4
10 Body control module 8
11 Front Heater Ventilation Air Conditioning/Blower
12 Passenger seat
13 Driver seat
14 Diagnostic link connector
15 Airbag
16 Trunk
17 Heater Ventilation Air Conditioning Controller
18 Radio, OnStar, Universal Hands‐Free Phone
19 Display
20 Automatic Occupant Sensing
21 Instrument Panel Cluster
22 Discrete Logic Ignition Switch
23 Body control module 3
24 Body control module 2
25 Rear Heater Ventilation Air Conditioning/Blower
26 AC DC inverter

 

Relays Usage
R1 Trunk relay
R2
R3 Power outlet relay

Rear Compartment Fuse Block

The rear compartment fuse block is located on the left side of the trunk behind a cover.

Buick LaCrosse - fuse box - rear compartment
Buick LaCrosse – fuse box – rear compartment
Mini Fuses Usage
5 Not Used
6 Heated Steering Wheel
7 Not Used
8 Not Used
12 Not Used
15 Not Used
18 Not Used
17 Not Used
18 PEPS
19 Not Used
20 Rear Sunshade, Ventilated Seats
21 Not Used
22 Not Used
23 Not Used
24 Not Used
25 Not Used
26 Not Used
27 Not Used
28 Not Used
29 Not Used
30 Not Used
31 Electronic Suspension Control
32 Rear Seat Infotainment
33 All‐Wheel Drive

 

J‐Case Fuses Usage
1 Not Used
2 Not Used
3 Not Used
4 Not Used
9 Not Used
10 Not Used
11 Not Used
13 Not Used
14 Not Used
34 Not Used
35 PEPS
36 Not Used
37 Not Used

 

Relays Usage
K1 Not Used
K2 Seat Ventilation, Sunshade
K3 Heated Steering Wheel
K4 Not Used

 

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.