Learn about Ford Focus (US) (2008-2011) fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The fuse boxes for the North American 2008–2011 Ford Focus are located inside the passenger compartment under the driver’s side dash and under the hood inside the engine compartment.
MUST READ: DYI – How to Check Car Fuses?
(2008-2011) Ford Focus (US) 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.
Ford Focus (US) (2008-2011) fuse assignment
Ford Focus (US) Year of production: 2004
Where Are the Fuse Boxes Located on the Ford Focus?
The 2008–2011 Ford Focus is equipped with two main fuse box locations: one in the engine compartment and one inside the cabin. This layout remained consistent with earlier Focus generations, making troubleshooting relatively straightforward.
1. Engine Compartment Fuse Box
The primary fuse box is located in the engine bay, mounted near the battery on the driver’s side, close to the firewall.
How to access it:
- Open the hood and locate the black plastic cover near the battery.
- Unclip the retaining tabs along the edges of the cover, most versions use simple snap-lock clips that don’t require tools.
- Lift the cover straight up to reveal the fuses and relays inside.
This fuse box protects higher-amperage components such as the headlights, engine cooling fan, horn, and starter relay. Since this area is exposed to engine heat and road moisture, make sure the cover is properly reseated after inspection to prevent corrosion.
2. Interior Fuse Panel (Instrument Panel Fuse Box)
The cabin fuse box is located inside the vehicle, typically at the end of the dashboard on the driver’s side, near the door.
How to access it:
- Open the driver’s door and locate the small access panel at the end of the dashboard, near the door hinge area.
- Gently pull or unclip the cover, it’s usually secured with simple plastic retaining clips.
- Once removed, you’ll see the fuse layout along with a couple of small relays.
This panel controls interior circuits such as the radio, interior lighting, wipers, hazard warning lights, power windows, and central locking system. This is likely the fuse box you’ll need to check most often for everyday electrical troubleshooting.
3. Additional Relays Near the Battery
Aside from the main engine bay fuse box, a few standalone relays, such as the fuel pump relay or main relay, may be located separately near the battery or along the inner fender panel, rather than housed within the primary fuse box.
How to access them:
- Inspect the area around the battery and inner fender for small, individually mounted relays plugged into the wiring harness.
- These relays can typically be pulled straight out of their socket for inspection or replacement.
Since these relays aren’t always grouped with the main fuse box, a wiring diagram specific to your Focus’s engine type is helpful for confirming exact locations.
How to Identify the Right Fuse or Relay
The fuse box covers typically include a printed diagram, either on the inside of the lid or on a label near the fuse block, listing each fuse and relay by number, amperage rating, and function.
When troubleshooting:
- Identify the malfunctioning component (e.g., “wipers” or “central locking”) and match it to its corresponding number on the diagram.
- Confirm the amperage rating on the old fuse matches the replacement before installing a new one.
- For relays, use a wiring diagram to confirm the correct location and function, since relays can look similar despite controlling different systems.
If the printed diagram is missing, faded, or hard to read, refer to your owner’s manual or a verified fuse box diagram specific to your Focus’s model year and trim, as slight differences can exist between S, SE, SES, and other trims.
Safety Precautions Before Checking Fuses or Relays
- Turn off the ignition and remove the key before touching any fuse or relay.
- For more involved electrical work, disconnect the negative battery terminal to prevent accidental short circuits.
- Use a fuse puller tool or needle-nose pliers rather than metal screwdrivers, which can cause sparking.
- Never replace a fuse with one of a higher amperage rating than specified, as this can overload the circuit and create a fire hazard.
- If a replacement fuse blows immediately, stop and inspect the circuit for an underlying short rather than continuing to swap fuses.
- Inspect fuse box connectors and relay sockets periodically for corrosion or wear, especially if the vehicle is frequently exposed to damp conditions.
Checking and Replacing Fuses in Ford Focus (US)
If electrical components in the vehicle are not working, a fuse may have blown. Blown fuses are identified by a broken wire within the fuse. Check the appropriate fuses before replacing any electrical components. To remove a fuse, use the fuse puller tool provided on the power distribution box cover located in the engine compartment.
Location of Fuse Boxes
Passenger Compartment Fuse Panel:
The fuse panel is located below and to the left of the steering wheel by the brake pedal. Remove the fuse panel cover to gain access to the fuses.
Power Distribution Box:
The power distribution box is located in the engine compartment. The power distribution box contains high-current fuses that protect your vehicle’s main electrical systems from overloads.
Fuse Box Diagrams
2008
Passenger Compartment Fuse Panel
List of fuses in the passenger compartment fuse panel (2008)
| № | A | Description |
|---|---|---|
| 1 | 30A | Not used (spare) |
| 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, Rear stop/turn lamps |
| 7 | 10A | Left Low beam Headlamp |
| 8 | 10A | Right Low beam Headlamp |
| 9 | 15A | Interior Lamps |
| 10 | 15A | Instmment Panei 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 | 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 | 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/Moonroof Switch Illunünation, 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 |
Power Distribution Box
List of fuses in the power distribution box (2008)
| № | A | 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 | – | Not used |
| 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 Fuse Panel
List of fuses in the passenger compartment fuse panel (2009)
| № | A | 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 Panei 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 accessory relay |
Power Distribution Box
List of fuses in the power distribution box (2009)
| № | A | 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 Fuse Panel
List of fuses in the passenger compartment fuse panel (2010)
| № | A | 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 panei 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 panei |
| 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 |
Power Distribution Box
List of fuses in the power distribution box (2010)
| № | A | 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 |
2011
Passenger Compartment Fuse Panel
List of fuses in the passenger compartment fuse panel (2011)
| № | A | 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 panei 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 panei |
| 40 | 20A | Not used (spare) |
| 41 | 15A | Door lock/sunroof switch illumination, Auto dimrrúng 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 |
Power Distribution Box
List of fuses in the power distribution box (2011)
| № | A | 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 |
Conclusion
Knowing the fuse box and relay locations on your 2008–2011 Ford Focus makes it much easier to handle minor electrical issues without unnecessary guesswork. With two main fuse box locations, one under the hood and one inside the cabin, plus a few standalone relays near the battery, this Focus generation is relatively simple to troubleshoot once you’re familiar with its layout.
Always handle fuses and relays with care, confirm amperage ratings before replacing any component, and use the printed diagram or a wiring reference to correctly identify each fuse or relay. If an electrical issue persists after replacing a fuse, or if you’re unsure about diagnosing the problem yourself, consulting a mechanic experienced with Ford Focus models is a smart next step
