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.

Ford Focus, Car Fuse Box, Ford

Ford Focus 2008-2011 Fuse Box Diagram – Location, Fuses & Relay Assignments

By Todd Mitchell

On: Saturday, August 9, 2025 4:30 PM

In this article we take a look at the second-generation Ford Focus (North America), produced from 2008 to 2011. Here you will find the fuse box diagrams for the Ford Focus 2008, 2009, 2010 and 2011, get information on the location of the fuse boxes in the car and learn about the assignment of each fuse (fuse layout) and relay.

The cigar lighter (socket) fuses are fuses №3 (socket) and №15 (front socket) in the engine compartment fuse box.

Fuse box location

Passenger compartment

The panel is located below and to the left of the steering wheel by the brake pedal.
Remove the cover under the steering wheel.

ford focus 2008 2011 fuse layout 1 2024 12 06 13 00 16

Engine compartment

The power distribution box is located in the engine compartment.

Fuse box diagrams

2008

Passenger compartment

Assignment of the fuses in the Passenger compartment (2008)

№	Amp Rating	Description
1	—	Not used
2	15A	Brake Switch CHMSL
3	15A	Satellite Radio
4	—	Not used
5	10A	Shift Interlock
6	20A	Right Front Turn lamp/Left Front Turn lamp
7	10A	Left Low beam Headlamp
8	10A	Right Low beam Headlamp
9	15A	Interior Lamps
10	15A	Instrument Panel Backlighting
11	—	Not used
12	7.5A	Power Mirrors
13	5A	SYNC
14	—	Not used
15	10A	Recirculated Air, Air Conditioning
16	—	Not used
17	20A	Power Locks, Trunk Release
18	20A	Heated Seats
19	—	Not used
20	15A	Data Link Connector
21	15A	Foglamps, Foglamp Indicator
22	15A	Parking Lamps
23	15A	High Beam Lamps
24	20A	Horn
25	10A	Demand Lamps, Trunk Lamps
26	10A	Instrument Cluster
27	20A	Ignition Switch
28	5A	Radio (Start)
29	5A	Instrument Cluster (Run/Start)
30	—	Not used
31	10A	ABS
32	10A	Restraints Control Module
33	—	Not used
34	—	Not used
35	—	Not used
36	5A	PATS Module
37	10A	Climate Control (Run/Start)
38	20A	Subwoofer
39	20A	Radio/CID/EFP
40	—	Not used
41	15A	Door Lock/Moonroof Switch Illumination, Electrochromic Mirror
42	—	Not used
43	10A	Instrument Cluster, Heated Seats (Run/Accessory)
44	—	Not used
45	5A	Front Wipers (logic)
46	7.5A	Front Passenger Sensing System
47	30A (circuit breaker)	Sunroof, Power Windows

Engine compartment

ford focus 2008 2011 fuse layout 4 2024 12 06 13 00 52

Assignment of the fuses in the Power distribution box (2008)

№	Amp Rating	Description
1	15A	Heated mirror
2	30A	Rear defrost
3	20A	Power point
4	20A	Fuel pump
5	10A	Powertrain control module (PCM) KAPWR / Canister Vent
6	15A	Alt sense
7	10A	Reverse lamps
8	—	Not used
9	40A	ABS motor
10	30A	Wipers
11	30A	Starter
12	40A	Blower
13	10A	A/C clutch
14	10A	PCM relay coil
15	20A	Front power point
16	20A	Cooling fan—low
17	30A	Cooling fan—high
18	20A	ABS solenoid
19	—	Spare
20	—	A/C clutch relay
21A		Rear defrost relay
21B	—	Not used
21C	—	Blower relay
21D	—	PCM relay
22	10A	Fuel injector
23	3A	Ambient lighting
24	—	Not used
25	—	Not used
26	15A	PCM MIL
27	—	Spare
28	15A	PCM
29	15A	Ignition
30A	—	Cooling fan low speed relay
30B	—	Starter relay
30C	—	Spare
30D	—	Cooling fan high speed relay
31A	—	Reverse lamp relay
31B	—	Fuel pump relay
31C	—	Spare
31D	—	Spare
31E	—	Spare
31F	—	Spare
32	—	A/C clutch diode
33	—	EEC diode
34	—	One Touch Integrated Start (OTIS) diode
35	10A	Run/Start

2009

Passenger compartment

ford focus 2008 2011 fuse layout 5 2024 12 06 13 01 04

Assignment of the fuses in the Passenger compartment (2009)

№	Amp Rating	Protected circuits
1	30A	Not used (spare)
2	15A	Brake Switch CHMSL
3	15A	Satellite radio
4	30A	Not used (spare)
5	10A	Shift Interlock
6	20A	Right Front Turn lamp/Left Front Turn lamp, Rear stop/turn lamps
7	10A	Left Low beam Headlamp
8	10A	Right Low beam Headlamp
9	15A	Interior Lamps
10	15A	Instrument Panel Backlighting
11	10A	Not used (spare)
12	7.5A	Power Mirrors
13	5A	SYNC
14	10A	Not used (spare)
15	10A	Recirculated Air, Air Conditioning
16	15A	Not used (spare)
17	20A	Power Locks, Trunk Release
18	20A	Heated Seats
19	25A	Not used (spare)
20	15A	Data Link Connector
21	15A	Fog lamps, Fog lamp Indicator
22	15A	Parking Lamps
23	15A	High Beam Lamps
24	20A	Horn
25	10A	Demand Lamps, Trunk Lamps
26	10A	Instrument Cluster
27	20A	Ignition Switch
28	5A	Radio (Start)
29	5A	Instrument Cluster (Run/Start)
30	5A	Not used (spare)
31	10A	ABS
32	10A	Restraints Control Module
33	10A	Not used (spare)
34	5A	Not used (spare)
35	10A	Not used (spare)
36	5A	PATS Module
37	10A	Climate Control (Run/Start)
38	20A	Subwoofer
39	20A	Radio/CID/EFP
40	20A	Not used (spare)
41	15A	Door Lock/sunroof switch illumination, Electrochromic mirror, Ambient lighting
42	10A	Not used (spare)
43	10A	Not used (spare)
44	10A	Not used (spare)
45	5A	Front Wipers (logic)
46	7.5A	Front Passenger Sensing System
47	30A (circuit breaker)	Sunroof, Power Windows
48	—	Delayed accessoiy relay

Engine compartment

ford focus 2008 2011 fuse layout 6 2024 12 06 13 01 13

Assignment of the fuses in the Power distribution box (2009)

№	Amp Rating	Protected circuits
1	15A	Heated mirror
2	30A	Rear defrost
3	20A	Power point
4	20A	Fuel pump
5	10A	Powertrain control module (PCM) KAPWR / Canister Vent
6	15A	Alt sense
7	10A	Reverse lamps
8	—	Not used
9	40A	ABS motor
10	30A	Wipers
11	30A	Starter
12	40A	Blower
13	10A	A/C clutch
14	10A	PCM relay coil
15	20A	Front power point
16	20A	Cooling fan—low
17	30A	Cooling fan—high
18	20A	ABS solenoid
19	—	Not used
20	—	A/C clutch relay
21A		Rear defrost relay
21B	—	Not used
21C	—	Blower relay
21D	—	PCM relay
22	10A	Fuel injector
23	—	Not used
24	—	Not used
25	—	Not used
26	15A	PCM MIL
27	—	Not used
28	15A	PCM
29	15A	Ignition
30A	—	Cooling fan low speed relay
30B	—	Starter relay
30C	—	Not used
30D	—	Cooling fan high speed relay
31A	—	Reverse lamp relay
31B	—	Fuel pump relay
31C	—	Wiper power relay
31D	—	Not used
31E	—	Not used
31F	—	Not used
32	—	A/C clutch diode
33	—	EEC diode
34	—	One Touch Integrated Start (OTIS) diode
35	10A	Run/Start

2010

Passenger compartment

ford focus 2008 2011 fuse layout 7 2024 12 06 13 01 22

Assignment of the fuses in the Passenger compartment (2010)

№	Amp Rating	Protected circuits
1	30A	Not used (spare)
2	15A	Brake switch (high-mount brake lamp)
3	15A	Not used (spare)
4	30A	Not used (spare)
5	10A	Shift interlock
6	20A	Right front turn lamp/Left front turn lamp, Rear stop/turn lamps
7	10A	Left low beam headlamp
8	10A	Right low beam headlamp
9	15A	Interior lamps
10	15A	Instrument panel backlighting
11	10A	Not used (spare)
12	7.5A	Power mirrors
13	5A	SYNC®
14	10A	Not used (spare)
15	10A	Recirculated air, Air conditioning
16	15A	Not used (spare)
17	20A	Power locks, Trunk release
18	20A	Heated seats
19	25A	Not used (spare)
20	15A	Data link connector
21	15A	Fog lamps, Fog lamp indicator
22	15A	Parking lamps
23	15A	High beam lamps
24	20A	Horn
25	10A	Demand lamps, Trunk lamps
26	10A	Instrument cluster
27	20A	Ignition switch
28	5A	Radio (Start)
29	5A	Instrument cluster (Run/Start)
30	5A	Not used (spare)
31	10A	Not used (spare)
32	10A	Restraints control module
33	10A	Not used (spare)
34	5A	Not used (spare)
35	10A	Anti-lock brake system (ABS)
36	5A	Passive anti-theft system (PATS) module
37	10A	Climate control (Run/Start)
38	20A	Subwoofer
39	20A	Radio, Center information display, Electronic finish panel
40	20A	Not used (spare)
41	15A	Door lock/sunroof switch illumination, Auto dimming rear view mirror, Ambient lighting
42	10A	Not used (spare)
43	10A	Not used (spare)
44	10A	Not used (spare)
45	5A	Front wipers (logic)
46	7.5A	Front passenger sensing system
47	30A (circuit breaker)	Sunroof, Power windows
48	—	Delayed accessory relay

Engine compartment

ford focus 2008 2011 fuse layout 8 2024 12 06 13 01 31

Assignment of the fuses in the Power distribution box (2010)

№	Amp Rating	Protected circuits
1	15A	Heated mirror
2	30A	Rear defrost
3	20A	Power point
4	20A	Fuel pump
5	10A	Powertrain control module (PCM) keep alive power, Canister Vent
6	15A	Alt sense
7	10A	Reverse lamps
8	—	Not used
9	40A	Anti-lock brake system (ABS) motor
10	30A	Wipers
11	30A	Starter
12	40A	Blower
13	10A	A/C clutch
14	10A	PCM relay coil
15	20A	Power point
16	20A	Cooling fan—low
17	30A	Cooling fan—high
18	20A	ABS solenoid
19	—	Not used
20	—	A/C clutch relay
21A		Rear defrost relay
21B	—	Not used
21C	—	Blower relay
21D	—	PCM relay
22	10A	Fuel injector
23	—	Not used
24	—	Not used
25	—	Not used
26	15A	PCM – emission related powertrain components
27	—	Not used
28	15A	PCM
29	15A	Ignition
30A	—	Cooling fan low speed relay
30B	—	Starter relay
30C	—	Not used
30D	—	Cooling fan high speed relay
31A	—	Reverse lamp relay
31B	—	Fuel pump relay
31C	—	Wiper power relay
31D	—	Not used
31E	—	Not used
31F	—	Not used
32	—	A/C clutch diode
33	—	EEC diode
34	—	One touch integrated start (OTIS) diode
35	10A	Run/Start

2011

Passenger compartment

Assignment of the fuses in the Passenger compartment (2011)

№	Amp Rating	Protected circuits
1	30A	Not used (spare)
2	15A	Brake switch (high-mount brake lamp)
3	15A	Not used (spare)
4	30A	Not used (spare)
5	10A	Shift interlock
6	20A	Right front turn lamp/Left front turn lamp, Rear stop/turn lamps
7	10A	Left low beam headlamp
8	10A	Right low beam headlamp
9	15A	Interior lamps
10	15A	Instrument panel backlighting
11	10A	Not used (spare)
12	7.5A	Power mirrors
13	5A	SYNC®
14	10A	Not used (spare)
15	10A	Recirculated air, Air conditioning
16	15A	Global positioning system (GPS) module
17	20A	Power locks, Trunk release
18	20A	Heated seats
19	25A	Not used (spare)
20	15A	Data link connector
21	15A	Fog lamps, Fog lamp indicator
22	15A	Parking lamps
23	15A	High beam lamps
24	20A	Horn
25	10A	Demand lamps, Trunk lamps
26	10A	Instrument cluster
27	20A	Ignition switch
28	5A	Radio (Start)
29	5A	Instrument cluster (run/start)
30	5A	Not used (spare)
31	10A	Not used (spare)
32	10A	Restraints control module
33	10A	Not used (spare)
34	5A	Not used (spare)
35	10A	Anti-lock brake system (ABS)
36	5A	Passive anti-theft system (PATS) module
37	10A	Climate control (run/start)
38	20A	Subwoofer
39	20A	Radio, Center information display, Electronic finish panel
40	20A	Not used (spare)
41	15A	Door lock/sunroof switch illumination, Auto dimming rear view mirror, Ambient lighting
42	10A	Not used (spare)
43	10A	Heated seats relay
44	10A	Not used (spare)
45	5A	Front wipers (logic)
46	7.5A	Front passenger sensing system
47	30A (circuit breaker)	Sunroof, Power windows
48	—	Delayed accessory relay

Engine compartment

ford focus 2008 2011 fuse layout 10 2024 12 06 13 01 50

Assignment of the fuses in the Power distribution box (2011)

№	Amp Rating	Protected circuits
1	15A	Heated mirror
2	30A	Rear defrost
3	20A	Power point
4	20A	Fuel pump
5	10A	Powertrain control module (PCM) keep alive power, Canister Vent
6	15A	Alt sense
7	10A	Reverse lamps
8	—	Not used
9	40A	Anti-lock brake system (ABS) motor
10	30A	Wipers
11	30A	Starter
12	40A	Blower
13	10A	A/C clutch
14	10A	PCM relay coil
15	20A	Power point
16	20A	Cooling fan – low
17	30A	Cooling fan – high
18	20A	ABS solenoid
19	—	Not used
20	—	A/C clutch relay
21A		Rear defrost relay
21B	—	Not used
21C	—	Blower relay
21D	—	PCM relay
22	10A	Fuel injector
23	—	Not used
24	—	Not used
25	—	Not used
26	15A	PCM – emission related powertrain components
27	—	Not used
28	15A	PCM
29	15A	Ignition
30A	—	Cooling fan low speed relay
30B	—	Starter relay
30C	—	Not used
30D	—	Cooling fan high speed relay
31A	—	Reverse lamp relay
31B	—	Fuel pump relay
31C	—	Wiper power relay
31D	—	Not used
31E	—	Not used
31F	—	Not used
32	—	Not used
33	—	EEC diode
34	—	One-touch integrated start (OTIS) diode
35	10A	Run/Start

Ford Focus 2008-2011 Fuse Box Diagram – Location, Fuses & Relay Assignments

Fuse box location

Passenger compartment

Engine compartment

Fuse box diagrams

2008

Passenger compartment

Engine compartment

2009

2010

2011

Engine compartment

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Ford Focus 2008-2011 Fuse Box Diagram – Location, Fuses & Relay Assignments

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2008

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