The Chevrolet Trax, produced from 2018 to 2022, is a compact SUV designed for urban driving with a focus on practicality, efficiency, and modern features. The electrical system in the Trax is central to its functionality, and the fuse box and relays are key components that ensure the vehicle’s various electrical systems operate smoothly.
The fuse box in the Chevrolet Trax is responsible for protecting the vehicle’s electrical circuits. These circuits control essential systems such as the engine management, lighting, infotainment, climate control, and power accessories like windows and locks. The Trax typically has two main fuse boxes: one located inside the cabin, usually under the dashboard on the driver’s side, and another in the engine compartment. The interior fuse box manages many of the vehicle’s comfort and convenience features, while the engine compartment fuse box handles more critical systems, such as those related to the engine and transmission.
Each fuse within the box is assigned to a specific electrical circuit and is designed to “blow” if there is an overload or short circuit. This action prevents damage to more expensive and sensitive components by cutting off the power to the affected circuit. For instance, if a particular system like the power windows or headlights stops working, checking the related fuse is the first step in troubleshooting the issue.
Relays in the Chevrolet Trax are electrically operated switches that control the power supply to high-current systems. These include the starter motor, fuel pump, cooling fans, and other power-intensive components. Relays are crucial because they allow a low-power control circuit to operate a high-power system without overloading the vehicle’s smaller switches and wiring.
Regular inspection and maintenance of the fuse box and relays in the Chevrolet Trax are essential for preventing electrical problems. If a fuse blows, replacing it with the correct type and rating is important to restore functionality to the affected system. Similarly, if a relay fails, it can cause more significant issues, such as preventing the engine from starting or causing the cooling system to malfunction.
By understanding the role of the fuse box and relays, Trax owners can better maintain their vehicle’s electrical system, ensuring that all features operate reliably and efficiently, contributing to a safe and comfortable driving experience.
MUST READ: DYI – How to Check Car Fuses?
(2018-2022) Chevrolet Trax fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Chevrolet Trax 2018-2022 fuse assignment
- Cigar lighter (power outlet) fuses in the Chevrolet Trax are the fuses F21 and F22 in the Instrument panel fuse box.
Year of production: from 2018, 2019, 2020, 2021, 2022
Passenger Compartment Fuse Box
Fuse box location
The fuse panel is located on the driver’s side of the instrument panel, behind the storage compartment. To remove the storage compartment, open the compartment and pull it out.
Fuse box diagram
Assignment of the fuses and relays in the instrument panel
| Fuses | Description |
|---|---|
| F1 | Body control module 1 |
| F2 | Body control module 2 |
| F3 | Body control module 3 |
| F4 | Body control module 4 |
| F5 | Body control module 5 |
| F6 | Body control module 6 |
| F7 | Body control module 7 |
| F8 | Body control module 8 |
| F9 | Discrete logic ignition switch |
| F10 | Sensing diagnostic module battery |
| F11 | Data link connector |
| F12 | HVAC module/ICS |
| F13 | Liftgate relay |
| F14 | Central gate module |
| F15 | 2018-2020: Lane departure warning/GENTEX |
| F16 | — |
| F17 | 2018-2020: Electrical steering column lock |
| F18 | Parking assist module/Side blind zone alert |
| F19 | Body control module/Regulated voltage control |
| F20 | Clock spring |
| F21 | A/C/Accessory power outlet/ PRNDM |
| F22 | Auxiliary power outlet/DC front |
| F23 | 2018-2020: HVAC/MDL/ICS |
| F24 | — |
| F25 | OnStar module/ Eraglonass |
| F26 | 2018: Heated steering wheel. 2019-2021: Electric vacuum pump |
| F27 | 2018-2020: Instrument cluster/ Auxiliary heater/ Auxiliary virtual image display 2021-2022: Instrument cluster |
| F28 | 2018-2020: Trailer feed 2 |
| F29 | 2018-2020: Infotainment system |
| F30 | 2018-2020: DC DC 400W |
| F31 | Instrument cluster module battery |
| F32 | Silver box audio module/Navigation |
| F33 | 2018-2020: Trailer feed 1 |
| F34 | Passive entry/ Passive start |
| Midi Fuses | |
| M01 | 2018-2020: Positive temperature coefficient |
| S/B Fuses | |
| S/B01 | 2018: Passenger power seat 1 2019-2020: Powertrain cooling – 1 2021-2022: HVAC Aux heater – 1 |
| S/B02 | 2018: Not Used. 2019-2020: Powertrain cooling – 2 2021-2022: HVAC Aux heater – 2 |
| S/B03 | Front power windows |
| S/B04 | Rear power windows |
| S/B05 | Logistic mode relay/ DC DC 400W |
| S/B06 | Driver power seat |
| S/B07 | — |
| S/B08 | 2018-2020: Trailer interface module |
| Circuit Breaker | |
| CB1 | — |
| Relays | |
| RLY01 | Accessory/Retained accessory power |
| RLY02 | Liftgate |
| RLY03 | — |
| RLY04 | Blower |
| RLY05 | Logistic mode |
Engine Compartment Fuse Box
Fuse box location
To remove the fuse block cover, squeeze the clip and lift it up.
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| № | Description |
|---|---|
| Mini Fuses | |
| 1 | Sunroof |
| 2 | 2018-2020: Exterior rearview mirror switch/ Driver side power window/ Rain sensor/ Universal garage door opener 2021-2022: Exterior rearview mirror switch/ Driver side power window/ Rain sensor |
| 3 | Canister vent solenoid |
| 4 | — |
| 5 | Electronic brake control module valve |
| 6 | 2018-2020: Intelligent battery sensor |
| 7 | 208-2021: Electric steering column lock |
| 8 | Transmission control module/FICM |
| 9 | Automatic occupancy sensing module |
| 10 | 2018-2020: Headlamp leveling switch/ Headlamp leveling motor/ Rear vision camera/ Interior rearview mirror 2021: Rear vision camera/ Interior rearview mirror 2022: Rear vision camera |
| 11 | Rear wiper |
| 12 | Rear window defogger |
| 13 | Power lumbar switch |
| 14 | Exterior rearview mirror heater |
| 15 | Fuel system control module batterv |
| 16 | Heated seat module/ Memory module |
| 17 | 2018-2020: TIM DC DC converter/Fuel system control module RC/ Compass module 2021: Fuel system control module RC/ Blow byheater 2022: Fuel system control module RC |
| 18 | Engine control module RC/ Transmission control module RC/ FICM RC |
| 19 | 2018-2020: Fuel pump |
| 20 | — |
| 21 | Fan relay (auxiliary BEC) |
| 22 | — |
| 23 | Ignition coil/ Injector coil |
| 24 | Washer pump |
| 25 | 2018-2020: Automatic headlamp leveling |
| 26 | EMS Var 1 |
| 27 | — |
| 28 | 2021-2022: Ignition 3 |
| 29 | Engine control module powertrain/ Ignition 1/lgnition 2 |
| 30 | EMS Var 2 |
| 31 | Left high-beam headlamp |
| 32 | Right high-beam headlamp |
| 33 | Engine control module battery |
| 34 | Horn |
| 35 | A/C clutch |
| 36 | 2018-2020: Front fog lamps |
| J-Case Fuses | |
| 1 | Electronic brake control module pump |
| 2 | Front wiper |
| 3 | Linear power module blower |
| 4 | IEC RC |
| 5 | — |
| 6 | — |
| 7 | — |
| 8 | Cooling fan low – mid |
| 9 | Cooling fan – high |
| 10 | 2018-2021: EVP |
| 11 | Starter solenoid |
| U-Micro Relays | |
| 2 | 2018-2021: Fuel pump |
| 4 | — |
| HC-Micro Relays | |
| 7 | Starter |
| Mini Relays | |
| 1 | Run/Crank |
| 3 | Cooling fan – mid |
| 4 | — |
| 5 | Powertrain relay |
| 8 | Cooling fan – low |
| HC-Mini Relays | |
| 6 | Cooling fan – high |
Auxiliary Relay Block
Auxiliary Relay Block
| Relays | Usage |
|---|---|
| 01 | 2018-2020: Electric vacuum pump |
| 02 | Cooling fan control 1 |
| 03 | Cooling fan control 2 |
| 04 | 2018-2020: Trailer (1.4L only) |
Rear Compartment Fuse Box
Fuse box location
It is located behind a cover on the left side of the rear compartment.
Fuse box diagram
Assignment of the fuses and relays in the luggage compartment
| Fuses | Description |
|---|---|
| F1 | 2018-2020: Amplifier audio |
| F2 | Rear drive control module |
| F3 | — |
| F4 | — |
| F5 | — |
| F6 | — |
| F7 | — |
| F8 | — |
| F9 | — |
| F10 | — |
| F11 | — |
| F12 | — |
| F13 | |
| F14 | — |
| F15 | _ |
| F16 | — |
| F17 | — |
| S/B Fuses | |
| S/B1 | 2018-2020: DC-DC transformer 400W |
| S/B2 | 2018-2020: DC-DC transformer 400W |
| S/B3 | DC/AC inverter module |
| S/B4 | — |
| S/B5 | — |
| Relays | |
| RLY01 | — |
| RLY02 | — |
| RLY03 | — |
| RLY04 | — |
| RLY05 | — |
| Circuit Breakers | |
| CB1 | — |
Conclusion
For owners and enthusiasts of classic Chevrolet Trax 2018-2022, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Chevrolet’s craftsmanship and innovation in the automotive industry during that era.
