2013 - 2016 Buick Lacrosse Fuse Box Diagram

2016 Buick Lacrosse

 

Fuses and Circuit Breakers

The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of damage caused by electrical problems.
To check a fuse, look at the silver-colored band inside the fuse.
If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location, if a fuse goes out. Replace the fuse as soon as possible.

Engine Compartment Fuse Block

 

Engine Compartment Fuse Box Location

 

To remove the fuse block cover, squeeze the three retaining clips on the cover and lift it straight up.

Caution
Spilling liquid on any electrical component on the vehicle may damage it. Always keep the  covers on any electrical component.

Engine Compartment Fuse Panel Diagram

The vehicle may not be equipped with all of the fuses, relays, and features shown.

J-Case Fuses .. Usage
6 Wiper
12 Starter
21 Rear Power Windows
22 Sunroof
24 Front Power Windows
25 Rear Heated Seats
26 Antilock Brake System (ABS) Pump
27 Electric Parking Brake
28 Rear Window Defogger
41 Brake Vacuum Pump
42 Cooling Fan K2
43 Not Used
44 Transmission Auxiliary Oil Pump (eAssist)
45 Cooling Fan K1
59 AIR Pump

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 (from Engine Control Module Relay)
11 6–Cylinder Engine: Post Catalytic Converter Oxygen Sensor Heater, Mass Air Flow  Sensor, FlexFuel Sensor, Secondary Air Induction Solenoid
13 Crank for Transmission Control Module/Fuel Pump Power/ Chassis Control Module  (eAssist)
14 Cabin Heater Coolant Pump (eAssist)/Secondary Air Injector/ Secondary Air Injector with
Pressure Sensor
15 Motor Generator Unit Coolant Pump (eAssist)
16 Run/Crank for eAssist Power Inverter Module
17 Not Used
18 Sunshade Module, Vehicle Air Purification System, Ventilated Seats
20 Heated Steering Wheel (non eAssist)
23 Variable Effort Steering (if equipped) or eAssist Power Inverter Module
29 Heated Seat, Left/ Power Lumbar
30 Heated Seat, Right/ Power Pack Cooling Fan (eAssist)
31 All-Wheel Drive, Electronic Suspension Control
32 Body Control Module 6
33 Memory Seat – Front
34 Antilock Brake System (ABS) Valves
35 Amplifier
36 Adaptive Forward Lighting (AFL) Motors – Battery
37 Right High Beam
38 Left High Beam
46 Cooling Fan Relay
47 6–Cylinder Engine: Pre Catalytic Converter Oxygen Sensor Heater, Canister Purge  Solenoid. 4–Cylinder Engine: Pre and Post Catalytic Converter Oxygen Sensor Heaters,  Canister Purge Solenoid
48 Fog Lamps
49 Right High Intensity Discharge Headlamp
50 Left High Intensity Discharge Headlamp
51 Horn
52 Cluster Run/Crank
53 Run/Crank for Inside Rearview Mirror, Rear Vision Camera, Air Quality Sensor, Aero Shutter Motor
54 Run/Crank for: Heating, Ventilation and Air Conditioning (HVAC), Headlamp Switch
55 Outside Rearview Mirror, Universal Remote System, Front Window Switches
56 Windshield Washer
60 Heated Mirror
62 Canister Vent
64 Adaptive Forward Lighting (AFL) Module – Battery
65 Not Used
66 AIR Solenoid (eAssist)
67 Fuel Pump Power Module/Chassis Control Module
69 Regulated Voltage Control Sensor
70 Parking Assist/Side Blind Zone  (2013 Model - Ultrasonic Parking Assist/Side Blind  Zone/Lane Departure Warning/ Rain Sensor)
71 Passive Entry/ Passive Start

Mini Relays .. Usage
7 Engine Control Module
9 Cooling Fan
13 Cooling Fan
15 Run/Crank
16 AIR Pump
17 Rear Window Defogger

Micro Relays .. Usage
1 Air Conditioning Compressor Clutch
2 Starter
4 Wiper Speed
5 Wiper Control
6 Cabin Heater Coolant Pump (eAssist)/Secondary Air Injector/ Secondary Air Injector with  Pressure Sensor
10 Cooling Fan
14 Headlamp Low Beam

 

Ultra Micro Relays  ..Usage
11 Transmission Auxiliary Oil Pump (eAssist)

Instrument Panel Fuse Block

 

Instrument Panel Fuse Box Location

The instrument panel fuse block is located in the instrument panel, on the driver side of the vehicle. To access the fuses, open the fuse panel door by pulling down at the top.
Press in on the sides of the door to release it from the instrument panel.

Pull the door toward you to release it from the hinge.

Instrument Panel Fuse Panel Diagram

The vehicle may not be equipped with all of the fuses, relays, and features shown.

Fuses .. Usage
1 APO 3 (2013 Model -  Steering Wheel Controls Backlight)
2 Body Control Module 7
3 Steering Wheel Controls Backlight
4 Radio/Human Machine Interface/ Rear Auxiliary Audio Jack/Front Auxiliary Audio Video Jack/ Touchpad/Remote Media Player/Blu– ray Remote Media Player
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 (J-Case Fuse)
11 Front Heater Ventilation Air Conditioning/ Blower (J-Case Fuse)
12 Passenger Seat (Circuit Breaker)
13 Driver Seat (Circuit Breaker)
14 Diagnostic Link Connector
15 Airbag/Automatic Occupant Sensing 

16 Trunk
17 Heater Ventilation Air Conditioning Controller
18 Pre-Fuse for Fuses 4 and 5
19 Center Stack Displays, Head-Up Display, Right Steering Wheel Control Switch, Rear
Seat Infotainment Display (eAssist), HVAC Center Stack Displays
20 Rear Seat Entertainment Display/Rear Seat Audio
21 Instrument 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 Not Used
R3 Power Outlet Relay