Jonathan Yarden Jan 30, 2021 · 5 min. read
In this article you will find a description of fuses and relays Buick,
with photos of block diagrams and their locations.
Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.
Year of production: 2018
Engine Compartment Fuse Block
Fuses | Usage |
1 | — |
2 | — |
3 | ABS pump |
5 | AC DC inverter |
6 | Rear closure |
7 | Left corner lamp |
8 | Power windows/ Rearview mirror/ Power seats |
9 | Engine boost |
10 | Airbag sensing diagnostic module/Passenger sensing module —eAssist |
11 | DC DC Battery 1 |
12 | Rear window defogger |
13 | Heated mirrors |
14 | — |
15 | Passive entry/ Passive start |
16 | Front wipers |
17 | Passenger power seat |
18 | ABS valve |
19 | Driver power sea |
21 | Sunroof |
22 | Right corner lamp |
23 | Auto headlamp leveling |
24 | — |
26 | Transmission control module/Ignition |
27 | Instrument panel/ Ignition |
28 | Electronic precision shift/Ignition |
29 | Rear vision camera/ Ventilation |
30 | Malfunction indicator lamp/Shift solenoid |
32 | Canister vent solenoid |
33 | Front heated seats |
34 | BSM (eAssist)/Fan control module/Damping control module (SADS) |
35 | Fog lamps |
36 | Fuel module |
38 | — |
39 | — |
40 | Steering columnn lock |
41 | — |
43 | Heated steering wheel |
44 | Headlamp leveling/ Rear seat ventilation |
45 | — |
46 | Engine control module/Ignition |
47 | — |
48 | Engine boost/Left cooling fan |
49 | DC DC battery 2/AWD |
50 | — |
51 | — |
52 | — |
53 | — |
54 | — |
55 | — |
56 | — |
57 | Transmission auxiliary pump |
58 | TRCM |
59 | High-beam headlamps |
60 | Cooling fan |
61 | — |
62 | — |
63 | — |
65 | A/C HEV |
67 | — |
68 | — |
69 | Right HID low-beam headlamps |
70 | Left HID low-beam headlamps |
72 | Starter pinion |
74 | Starter motor |
75 | Engine control module |
76 | Powertrain – off engine |
77 | — |
78 | Horn |
79 | Washer pump |
81 | Transmission control module/ Engine control module |
82 | — |
83 | Ignition coils |
84 | Coil |
85 | Engine control module switch 2 |
86 | Engine control module switch 1 |
87 | SAI reaction pump |
88 | Aeroshutter |
89 | Headlamp washer |
91 | — |
92 | TPIM motor generator unit pump |
93 | Headlamp leveling |
95 | SAI reaction solenoid |
96 | Fuel heater |
97 | — |
99 | Coolant pump |
Relays | Usage |
4 | AC DC inverter |
20 | Rear defogger |
25 | Front wiper control |
31 | Run/Crank |
37 | Front wiper speed |
42 | Transmission auxiliary pump |
64 | A/C control |
66 | Powertrain |
71 | HID low-beam headlamps |
73 | Starter motor |
80 | Starter pinion |
90 | SAI reaction solenoid |
94 | Headlamp washer |
98 | SAI reaction pump |
Instrument Panel Fuse Block
The instrument panel fuse block is in the instrument panel, on the driver side of the vehicle.
Fuses | Usage |
F1 | Left window |
F2 | Right window |
F3 | — |
F4 | HVAC blower |
F5 | Battery 2 |
F6 | Electric steering column |
F7 | — |
F8 | Battery 3 |
F9 | Engine control module/Battery |
F10 | Body control module 2 On/Off |
F11 | — |
F12 | — |
F13 | — |
F14 | — |
F15 | Transmission control module On/Off |
F16 | Amplifier |
F17 | — |
F18 | Battery 7 |
F19 | — |
F20 | Battery 1 |
F21 | Battery 4 |
F22 | Battery 6 |
F23 | Electric steering column lock |
F24 | Airbag sensing diagnostic module/ Passenger sensing module |
F25 | Diagnostic link |
F26 | — |
F27 | AC DC inverter |
F28 | — |
F29 | Body control module 8 |
F30 | Overhead console |
F31 | Steering wheel control |
F32 | — |
F33 | HVAC |
F34 | Center gateway module |
F35 | Integrated chassis control module |
F36 | Charger |
F37 | Auxiliary power outlet/Cigar lighter |
F38 | OnStar |
F39 | Monitor |
F40 | Object detection |
F41 | Body control module 1 On/Off |
F42 | Radio |
F43 | Rear accessory power outlet |
F44 | Front accessory power outlet |
Relays | Usage |
K1 | — |
K2 | Retained accessory power |
K3 | — |
K4 | — |
K5 | Logistics |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
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