Understanding your 2010 Ford Focus’s fuse box is crucial for diagnosing and resolving electrical issues. Fuses protect your vehicle’s electrical circuits from overloads, and knowing their locations and functions can save you time and money on repairs. This guide will specifically focus on the fuse locations relevant to your 2010 Ford Focus, with a special emphasis on the OBD2 port fuse location, ensuring you can effectively troubleshoot common electrical problems.
Fuse Box Locations in Your 2010 Ford Focus
Like most vehicles, the 2010 Ford Focus has multiple fuse boxes located in different areas of the car. Knowing where these fuse boxes are is the first step in any electrical troubleshooting process. In the 2010 Ford Focus, you will find fuse panels in two primary locations: the passenger compartment and the engine compartment.
Passenger Compartment Fuse Box
The passenger compartment fuse box, also known as the instrument panel fuse box, is situated inside the car for easy access. Specifically, in the 2010 Ford Focus, you can find this panel located beneath the steering wheel, on the left-hand side, near the brake pedal.
Passenger compartment fuse box location in a 2010 Ford Focus.
To access it, you’ll need to remove the cover panel located under the steering wheel. This fuse box primarily controls circuits for interior functions, such as lights, radio, and accessories.
Engine Compartment Fuse Box
The second main fuse box is located in the engine compartment. This power distribution box houses fuses and relays that manage critical engine and vehicle systems.
Engine compartment fuse box location in a 2010 Ford Focus.
You’ll find this fuse box under the hood, typically on the driver’s side, near the engine. This box contains fuses for systems like the engine control module (PCM), fuel pump, cooling fans, and other vital components.
2010 Ford Focus Fuse Diagrams and Fuse Assignments
Once you’ve located the fuse boxes, the next step is to understand the fuse layout. Fuse diagrams are essential for identifying the correct fuse for a specific circuit. Below are the fuse diagrams and assignments for both the passenger compartment and engine compartment fuse boxes in a 2010 Ford Focus.
Passenger Compartment Fuse Diagram (2010 Ford Focus)
Here’s a detailed diagram and table outlining the fuse assignments for the passenger compartment fuse box in your 2010 Ford Focus.
2010 Ford Focus Passenger Compartment Fuse Box Diagram
| # | 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 (OBD2 Port) |
| 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 |
Note: Fuse #20, rated at 15A, is specifically designated for the Data Link Connector. This is your 2010 Ford Focus Obd2 Fuse Location. If you are experiencing issues with your OBD2 scanner not powering up or connecting, this fuse should be one of the first things you check.
Engine Compartment Fuse Diagram (2010 Ford Focus)
Below is the fuse diagram and assignment table for the engine compartment fuse box in a 2010 Ford Focus.
2010 Ford Focus Passenger Compartment Fuse Box Diagram
| # | 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 |
Understanding the OBD2 Port Fuse and Its Importance
The On-Board Diagnostics II (OBD2) port is a critical interface in your 2010 Ford Focus. It’s used by mechanics and car owners to read diagnostic trouble codes, monitor vehicle performance, and perform various system checks. The OBD2 port needs power to function, and this power is protected by a fuse.
As highlighted in the passenger compartment fuse diagram, Fuse #20 (15A) is the Data Link Connector fuse, which powers the OBD2 port. If your OBD2 scanner is not working when plugged into your Ford Focus, checking this fuse is a vital first step. A blown fuse here can prevent communication with your vehicle’s computer, hindering diagnostics and repairs.
Troubleshooting Steps for OBD2 Port Issues:
- Locate the Passenger Compartment Fuse Box: As described earlier, it’s under the steering wheel.
- Identify Fuse #20: Use the fuse diagram to pinpoint fuse number 20.
- Inspect the Fuse: Visually check the fuse. A blown fuse will usually have a broken wire inside or a darkened appearance.
- Replace if Blown: If the fuse is blown, replace it with a new 15A fuse. Ensure you are using the correct amperage to avoid further electrical problems.
- Test the OBD2 Port: After replacing the fuse, try your OBD2 scanner again to see if it now powers up and connects.
Conclusion
Knowing the fuse locations and assignments for your 2010 Ford Focus, especially the OBD2 fuse location (Fuse #20 in the passenger compartment), is invaluable for vehicle maintenance and troubleshooting. By understanding your vehicle’s electrical system and being able to check and replace fuses, you can address minor electrical issues efficiently and ensure your Ford Focus remains in optimal running condition. Remember to always consult your vehicle’s owner’s manual for the most accurate and detailed information regarding your specific model.
For further reading:
- How to check the fuses?
- How to replace a blown fuse?
- Why do car fuses blow?
- Types of automotive fuses
