Table of Contents
This article provides a detailed overview of the fuse block diagrams for the sixth-generation Buick Regal (model years 2018, 2019, 2020, 2021, and 2022).
Fuses #37, #43, and #44 in the instrument panel fuse block protect the cigarette lighter and 12-volt accessory power receptacles.
Engine Compartment Fuse Block
The fuse block is located on the driver’s side of the engine compartment.
General view of the fuse block.
| Diagram | |
|---|---|
|
|
| No. | Circuit / Component |
| Relays | |
| R4 | Not used |
| R20 | Rear window defogger |
| R25 | Front wiper control |
| R31 | Run / Crank |
| R37 | Front wiper speed |
| R42 | Not used |
| R64 | Starter motor |
| R66 | Powertrain |
| R71 | Right LED high beam |
| R73 | A/C clutch |
| R80 | Starter pinion |
| R90 | Charge air coolant pump |
| R94 | Not used |
| R98 | Fuel heater |
| Fuses | |
| 1 | Not used |
| 2 | Not used |
| 3 | Antilock Brake System (ABS) pump |
| 5 | Not used |
| 6 | Power liftgate / Rear closure |
| 7 | Fog lamps |
| 8 | Memory seat control module |
| 9 | Heated windshield |
| 10 | Lumbar support |
| 11 | DC/DC converter 1 |
| 12 | Rear window defogger |
| 13 | Heated mirrors |
| 14 | Not used |
| 15 | Not used |
| 16 | Front wipers |
| 17 | Passenger power seat |
| 18 | Sunshade |
| 19 | Driver power seat |
| 21 | Sunroof / Moonroof |
| 22 | Rear wiper |
| 23 | Automatic headlamp leveling |
| 24 | Not used |
| 26 | Transmission Control Module (TCM) / Ignition |
| 27 | Instrument panel / Ignition |
| 28 | Not used |
| 29 | Rear vision camera / Ventilation |
| 30 | Malfunction Indicator Lamp (MIL) / Shift solenoid |
| 32 | EVAP canister vent / Video processing module |
| 33 | Heated seats (front) |
| 34 | Heated seats (rear) |
| 35 | All-Wheel Drive (AWD) damping control module |
| 36 | Fuel pump |
| 38 | Not used |
| 39 | Not used |
| 40 | Steering column lock |
| 41 | Not used |
| 43 | Heated steering wheel |
| 44 | Headlamp leveling control module |
| 45 | Not used |
| 46 | Engine Control Module (ECM) / Ignition |
| 47 | Not used |
| 48 | Cooling fan / DC/DC converter 2 |
| 49 | Rear Drive Control Module (RDCM) |
| 50 | Not used |
| 51 | Not used |
| 52 | Not used |
| 53 | Not used |
| 54 | Not used |
| 55 | Not used |
| 56 | Starter |
| 57 | Not used |
| 58 | Not used |
| 59 | Left LED lamps |
| 60 | Cooling fan |
| 61 | Not used |
| 62 | Not used |
| 63 | Not used |
| 65 | A/C (Hybrid Electric Vehicle) |
| 67 | Not used |
| 68 | Not used |
| 69 | Right LED lamps / Right high-beam headlamps |
| 70 | Left high-beam headlamps |
| 72 | Starter pinion |
| 74 | Not used |
| 75 | Engine Control Module (ECM) |
| 76 | Powertrain – off engine |
| 77 | Not used |
| 78 | Horn |
| 79 | Washer pump control module |
| 81 | Transmission Control Module (TCM) / Engine Control Module (ECM) |
| 82 | Not used |
| 83 | Ignition coils |
| 84 | Ignition coil |
| 85 | 60A shunt |
| 86 | Not used |
| 87 | Secondary Air Injection (SAI) / Fuel heater module |
| 88 | Active aero shutter module |
| 89 | Not used |
| 91 | Not used |
| 92 | Traction Power Inverter Module (TPIM) / Motor generator |
| 93 | Keyless entry control module |
| 95 | Charge air coolant pump |
| 96 | Fuel heater |
| 97 | Not used |
| 99 | Not used |
Instrument Panel Fuse Block
The interior fuse block is located in the instrument panel on the driver’s side.
Access overview.
| Diagram | |
|---|---|
|
|
| Relays | |
| K1 | Not used |
| K2 | Accessory power relay |
| K3 | Not used |
| K4 | Not used |
| K5 | Logistics control relay |
| Fuses | |
| F1 | Power window (Left) |
| F2 | Power window (Right) |
| F3 | Not used |
| F4 | HVAC blower motor |
| F5 | Battery 2 |
| F6 | Power steering column |
| F7 | Not used |
| F8 | Battery 3 |
| F9 | Engine Control Module (ECM) / Battery |
| F10 | Body Control Module (BCM) 2 On / Off |
| F11 | Not used |
| F12 | Not used |
| F13 | Not used |
| F14 | Not used |
| F15 | Transmission Control Module (TCM) On / Off |
| F16 | Audio amplifier |
| F17 | Not used |
| F18 | Battery 7 |
| F19 | Not used |
| F20 | Battery 1 |
| F21 | Battery 4 |
| F22 | Battery 6 |
| F23 | Electric steering column lock |
| F24 | Airbag Sensing and Diagnostic Module (SDM) / Passenger sensing module |
| F25 | Data Link Connector (DLC) |
| F26 | Not used |
| F27 | DC/AC inverter |
| F28 | Not used |
| F29 | Body Control Module (BCM) 8 |
| F30 | Overhead console |
| F31 | Steering wheel control module |
| F32 | Not used |
| F33 | HVAC control module |
| F34 | Central gateway control module |
| F35 | Integrated chassis control module |
| F36 | Wireless charger |
| F37 |
|
| F38 | OnStar system |
| F39 | Display monitor |
| F40 | Object detection system |
| F41 | Body Control Module (BCM) 1 On / Off |
| F42 | Radio / Infotainment |
| F43 | 12V accessory power receptacle (Rear) / Cigarette lighter |
| F44 | 12V accessory power receptacle (Front) / Cigarette lighter |
