What is a car fuse box and where is it located?

A car fuse box is an electrical distribution center that houses fuses and relays protecting your vehicle's electrical circuits. Most vehicles have multiple fuse boxes: the main box is typically located under the hood near the engine, while the interior panel is usually under the dashboard on the driver's side or beneath the steering wheel. Consult your owner's manual or our fuse diagrams to find the exact location for your specific make and model. Knowing your fuse box location is essential for troubleshooting electrical problems and performing maintenance.

How do I read a fuse box diagram?

Fuse box diagrams show the location and amperage rating of each fuse and relay. Each position is numbered and labeled with the circuit it protects (headlights, wipers, power windows, etc.) and the fuse's amperage rating (5A, 10A, 15A, 20A, etc.). The diagram indicates whether positions contain fuses or relays. Color-coded fuses help identify amperage: blue for 15A, yellow for 20A, red for 10A, and brown for 7.5A. Our detailed diagrams include this information for every vehicle, making it easy to identify the correct fuse for any circuit.

What does an amperage rating mean on a fuse?

A fuse's amperage rating indicates how much electrical current it can safely handle before blowing. Common ratings include 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, and 40A. Higher-amperage fuses protect circuits with greater power demands like the alternator or starter motor. Lower ratings protect sensitive circuits like dashboard lights or power windows. Never use a fuse with a higher amperage rating than specified, as this can allow excessive current through the circuit, creating fire hazards and damaging electrical components. Always replace blown fuses with the exact amperage specified in your vehicle's diagram.

Why does my fuse keep blowing?

A repeatedly blown fuse indicates an underlying electrical problem requiring investigation. Common causes include short circuits in wiring, failing electrical components, water damage in connectors, or improper installation of aftermarket equipment. Never simply replace the fuse multiple times without addressing the root cause. Start by checking the affected circuit for loose connections, damaged wiring, or burned components. If the problem persists, consult a professional mechanic. Our fuse box diagrams help you identify which circuit is problematic, allowing you to pinpoint the issue quickly and prevent vehicle damage or fire hazards.

How do I safely replace a blown fuse?

To safely replace a blown fuse: (1) Turn off the engine and all electrical systems. (2) Locate the fuse box using our diagram. (3) Find the blown fuse by examining the filament inside—a blown fuse appears darkened or broken. (4) Note the amperage rating on the fuse. (5) Remove the blown fuse using the provided fuse puller tool or carefully with your fingers. (6) Insert a new fuse with the exact same amperage rating. (7) Start the engine to verify the circuit works. If the replacement fuse blows immediately, don't replace it again—seek professional service. Our detailed diagrams ensure you find the correct fuse position quickly.

What's the difference between a fuse and a relay?

Fuses are passive protection devices that melt and break the circuit when current exceeds safe levels, preventing damage and fire. Relays are electromagnetic switches that control high-power circuits using low-power signals from switches. Fuses protect circuits from overcurrent, while relays switch circuits on and off or redirect power. Fuse boxes contain both components, and our diagrams identify which positions contain fuses and which contain relays. Understanding this distinction helps you troubleshoot problems: a blown fuse indicates overcurrent issues, while a relay failure causes the circuit to not respond to control switches.

Where can I find the fuse diagram for my specific vehicle?

ProCarManuals provides comprehensive fuse box diagrams for thousands of vehicle makes and models organized by year. Use our search feature to find your specific vehicle by make, model, and year. We cover Acura, Honda, Toyota, Ford, Chevrolet, BMW, Mercedes, Audi, and many other manufacturers. Each diagram shows the fuse box location, circuit labels, amperage ratings, and detailed explanations. Our guides help you quickly locate the fuse you need, understand circuit functions, and troubleshoot electrical problems. If you can't find your vehicle, contact our support team for assistance.

What electrical problems can I diagnose with a fuse diagram?

Fuse diagrams help diagnose non-functioning circuits by showing which fuse protects which system. If your headlights don't work, find the headlight fuse position in the diagram and check if it's blown. Same for power windows, wipers, interior lights, power seats, and other electrical features. A blown fuse indicates an overcurrent condition in that circuit. Non-blown fuses with non-functioning components suggest relay failure, wiring problems, or failed switches. Our detailed diagrams identify circuit names and their locations, allowing you to systematically troubleshoot electrical issues before seeking expensive professional service. Replace blown fuses with correct amperage ratings and investigate repeated failures.

Are fuse boxes the same in all model years of the same vehicle?

Fuse box layouts often change between model years, even for the same vehicle make and model. Engine updates, added safety features, new electrical systems, and design revisions cause manufacturers to modify fuse configurations. A 2020 Honda Civic may have a different fuse box layout than a 2015 Civic. ProCarManuals provides separate diagrams for each model year to ensure accuracy. Always consult the diagram for your specific year to find the correct fuse positions. Incorrect fuse selection from a different year could damage circuits or create safety hazards. Our organized, year-specific diagrams prevent these mistakes.

What should I do if my vehicle has multiple fuse boxes?

Most vehicles have at least two fuse boxes: the main underhood panel near the engine and an interior panel under the dashboard. Some vehicles have additional fuse boxes in the rear, under seats, or in other locations. Our comprehensive diagrams identify every fuse box location in your vehicle and provide separate diagrams for each one. The underhood box typically protects engine-related circuits (fan, fuel pump, ignition), while the interior box protects comfort and convenience features (windows, lights, wipers, seats). Identifying which fuse box contains the circuit you need prevents wasting time searching. Always consult all relevant diagrams when troubleshooting electrical problems in multi-box systems.

Can I use a higher amperage fuse to prevent future blown fuses?

Never use a fuse with higher amperage than specified. Doing so creates serious safety risks. Higher-amperage fuses allow excessive current through circuits designed for lower power, causing wire overheating, component damage, and potential fires. If a fuse blows, it indicates the circuit is drawing more current than safe, often due to shorts, failing components, or improper modifications. Installing a higher-amperage fuse masks the problem rather than solving it. Always replace fuses with the exact amperage rating shown in your vehicle's fuse diagram. If a replacement fuse blows immediately, investigate the underlying electrical fault. Professional diagnosis prevents damage and ensures vehicle safety.

GAC GS3 Power 2021-2022 Fuse Box Diagram – Location, Fuses & Relay Assignments

By Todd Mitchell

On: Thursday, July 17, 2025 5:50 PM

The GAC GS3 Power subcompact crossover was produced from 2018 to 2023. In this article you will find the fuse box diagrams for the GAC GS3 Power 2021 and 2022, get information on the location of the fuse boxes inside the car and learn about the assignment of each fuse (fuse layout) and relay.

Passenger Compartment Fuse Box

Fuse Box Location

Instrument panel PDU is installed inside the left instrument panel as arrowed.

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Fuse Box Diagram

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Assignment of the fuses in the dashboard

№	Amps	Function
IF01	—	—
IF02	20A	Electric adjustment of left front seat
IF03	15A	Power sunroof ECU
IF04	—	—
IF05	—	—
IF06	—	—
IF07	30A	BCM (front right window regulator) / BCM (rear right window regulator)
IF08	30A	BCM (front left window regulator) / BCM (rear left window regulator)
IF09	—	—
IF10	—	—
IF11	15A	BCM (windshield washer and rear wiper motor)
IF12	10A	Rearview mirror folding
IF13	—	—
IF14	15A	IG2 relay
IF15	—	—
IF16	30A	Instrument panel PDU
IF17	7.5A	OBD DLC
IF18	20A	BCM (main lamps)
IF19	7.5A	GWM / PEPS ECU
IF20	—	—
IF21	10A	BCM (turn signal lamp)
IF22	—	—
IF23	7.5A	Ignition switch / PEPS ECU
IF24	20A	BCM (main lamps)
IF25	7.5A	High-mounted stop lamp
IF26	20A	BCM (door lock)
IF27	—	—
IF28	SHUNT	Shorting link
IF29	10A	SRS ECU
IF30	7.5A	1.5T GDI ECM / G-DCT TCU / 6AT TCU / 1.5TM ECM
IF31	7.5A	GWM / BCM / PEPS ECU
IF32	—	—
IF33	7.5A	SAS / electric power steering control unit / 6AT GSM / G-DCT GSM
IF34	7.5A	ESPI / brake switch
IF35	7.5A	ACU / T-BOX ECU / instrument cluster
IF36	25A	Ignition switch
IF37	7.5A	Left front combination lamp (leveling motor) / right front combination lamp (leveling motor) / ALS switch / RPA ECU
IF38	7.5A	Power sunroof ECU / LDW ECU / Seat heater / HCP / HVAC control unit / negative ion generator
IF39	15A	6AT TCU
IF40	20A	ACU
IF41	7.5A	BCM / PEPS ECU / G-DCT TCU
IF42	7.5A	USB 5V power supply
IF43	—	—
IF44	7.5A	ACU / rearview mirror adjusting switch
IF45	—	—
IF46	20A	Cigarette lighter
IF47	—	—
IF48	7.5A	PEPS ECU
IF49	7.5A	Defogger relay / blower relay
IF50	7.5A	Ignition switch / PEPS ECU / BCM / G-DCT TCU / 1.5T GDI ECM / 1.5TM ECM
IF51	7.5A	T-BOX ECU
IF52	7.5A	HVAC control unit
IF53	—	—
IF54	7.5A	LDW ECU / EPB switch / G-DCT GSM
IF55	15A	BCM
IF56	7.5A	HCP / instrument cluster / AV display
IR01	—	IG1 relay
IR02	—	IG2 relay
IR03	—	—
IR04	—	—
IR05	—	ACC relay
IR06	—	Rearview mirror folding relay
IR07	—	Rearview mirror unfolding relay

Engine Compartment Fuse Box

Fuse Box Location

Press the fixing clip in the direction of arrow to release the cover of the PDU.

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Fuse Box Diagram

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Assignment of the fuses in the engine compartment

№	Amps	Function
EF01	50A	Low speed fan relay
EF02	50A	High speed fan relay 2
EF03	—	—
EF04	—	—
EF05	—	—
EF06	40A	ESPI
EF07	7.5A	A/C compressor
EF08	30A	IG1 relay
EF09	—	—
EF10	20A	Seat heater
EF11	—	—
EF12	—	—
EF13	15A	Left front low beam
EF14	15A	Right front low beam
EF15	7.5A	1.5TM ECM / 1.5T GDI ECM
EF16	7.5A	Rearview mirror heater
EF17	40A	G-DCT control unit
EF18	30A	ACC relay / ignition switch
EF19	7.5A	Brake switch / low beam relay / main relay / wiper speed control relay / wiper relay
EF20	—	—
EF21	—	—
EF22	—	—
EF23	15A	Fuel pump
EF24	20A	Wiper
EF25	7.5A	G-DCT TCU / 1.5TGDI ECM / 1.5TM ECM
EF26	15A	Horn relay/horn
EF27	10A	G-DCT control unit
EF28	15A	High beam relay/left front high beam / right front high beam
EF29	10A	Electronic water pump
EF30	10A	VCT (exhaust) / VCT (intake) / canister solenoid valve / oil pump solenoid valve / clutch position sensor / CSV / relief valve / waste gate
EF31	10A	Downstream oxygen sensor / upstream oxygen sensor
EF32	15A	1.5T GDI ECM / 1.5TM ECM
EF33	15A	Ignition coil 1 / ignition coil 2 / ignition coil 3 / ignition coil 4
EF34	7.5A	Compressor relay / starter relay 1 / high speed fan relay 2 / starter relay 2 / low speed fan relay / fuel pump relay / high speed fan relay 1
EF35	80A	EPS ECU
EF36	—	—
EF37	40A	Blower
EF38	40A	ESPI
EF39	40A	Rear windshield defogger heater / rearview mirror heater
EF40	150A	Main fuse
EF41	30A	Starter relay 1 / ignition switch
EF42	50A	Instrument panel PDU
EF43	50A	Instrument panel PDU
EF44	—	—
EF45	—	—
EF46	—	—
EF47	—	—
EF48	—	—
EF49	—	—
ER01	—	Low speed fan relay
ER02	—	High speed fan relay 2
ER03	—	Fuel pump relay
ER04	—	—
ER05	—	High speed fan relay 1
ER06	—	Wiper speed control relay
ER07	—	Wiper relay
ER08	—	High beam relay
ER09	—	Defogger relay
ER10	—	Blower relay
ER11	—	Low beam relay
ER12	—	Main relay
ER13	—	Compressor relay
ER14	—	—
ER15	—	Starter relay 1
ER16	—	Starter relay 2
ER17	—	—
ER18	—	—
ER19	—	Horn relay
ER20	—	—

Fuses in battery PDU

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№	Amps	Feature/component
PF01	300A	Starter / engine compartment PDU
PF02	7.5A	EBS