Learn about Ford Focus (US) (2005-2007) fuse box and relay’s locations, functions, and maintenance tips for optimal vehicle electrical system.
The Ford Focus continued to be a popular compact car choice in the US throughout 2005–2007, offering practical transportation with a range of trim levels and engine options. Like all vehicles, the Focus depends on fuses and relays to protect its electrical system from power surges, short circuits, and wiring faults that could otherwise cause costly damage.
If you’re dealing with issues like non-working headlights, a dead radio, or wipers that won’t respond, a blown fuse or faulty relay is often the culprit. Knowing exactly where your Focus’s fuse boxes are located and how to safely access them, can help you resolve many common electrical problems yourself, saving time and avoiding an unnecessary trip to the mechanic.
This guide covers the fuse box and relay locations for the 2005–2007 Ford Focus (US), along with practical access tips and safety precautions.
MUST READ: DYI – How to Check Car Fuses?
(2005-2007) 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) (2005-2007) fuse assignment
Ford Focus (US) Year of production: 2005, 2006, 2007
Where Are the Fuse Boxes Located on the Ford Focus?
The 2005–2007 Ford Focus is equipped with two main fuse box locations: one in the engine compartment and one inside the cabin. This layout remained largely consistent with earlier Focus models, 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 (on models so equipped). 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 (Zetec or Duratec) 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 due to the vehicle’s age, 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 ZX3, ZX4, ZX5, 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.
- Given the age of this vehicle, inspect fuse box connectors and relay sockets for corrosion or brittle plastic, which can develop over time.
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 CD stowage box to access 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
2005
Passenger Compartment Fuse Panel
List of fuses in the passenger compartment fuse panel (2005)
| № | A | Description |
|---|---|---|
| R17 | – | Starter relay |
| R18 | – | Rear wiper intermittent relay |
| R19 | – | Front wiper intermittent relay |
| R20 | – | Not used |
| R21 | – | Not used |
| R22 | – | Decklid/Liftgate release relay |
| R23 | – | Horn relay |
| R24 | – | Battery saver relay |
| R25 | – | Rear defrost/Heated mirror relay |
| 30 | 10A | Parking lamps |
| 31 | 20A | Radio |
| 32 | 15A | Turn signal (GEM) |
| 33 | 20A | Horn |
| 34 | 20A | Power sunroof |
| 35 | 7.5A | Interior lamps, Power mirrors |
| 36 | 7.5A | A/C switch, Instrument cluster |
| 37 | 25A | Decklid/Liftgate release |
| 38 | – | Not used |
| 39 | – | Not used |
| 40 | 10A | Back-up lamps (automatic transaxle only) |
| 41 | 7.5A | Radio and cluster (accessory) |
| 42 | 10A | Stop lamps |
| 43 | 15A | Rear wiper, Sunroof (ignition) |
| 44 | – | Not used |
| 45 | 7.5A | Recirculated air, Air conditioning |
| 46 | – | Not used |
| 47 | 20A | Cigar lighter/Power point |
| 48 | 10A | Data link connector |
| 49 | 25A | Rear defroster |
| 50 | 7.5A | Heated mirror, Heated backlite indicator |
| 51 | 7.5A | Front passenger sensing system |
| 52 | 15A | Heated seats |
| 53 | 10A | Back-up lamps (manual transaxle only), Speed control |
| 54 | 25A | Rear power Windows |
| 55 | 25A | Front power Windows |
| 56 | 20A | Front wipers |
| 57 | – | Not used |
| 58 | – | Not used |
| 59 | 7.5A | Light switch (headlamps) |
| 60 | 7.5A | Air bag module |
| 61 | 7.5A | PATS modules, Instrument cluster |
| 62 | 7.5A | Radio (Start) |
| 63 | 20A | Power locks (GEM) (Fuse 63 is located on the back of the fuse panel. See your authorized dealer for service of this fuse.) |
Power Distribution Box
List of fuses in the power distribution box (2005)
| № | A | Description |
|---|---|---|
| 1 | 40A | Main power supply (to passenger compartment fuse panel) |
| 2 | – | Not used |
| 3 | – | Not used |
| 4 | 30A | Air pump motor (PZEV engine only) |
| 5 | – | Not used |
| 6 | 50A | Engine cooling fan (Primary fuse) |
| 7 | 40A | Main power supply (to passenger compartment fuse panel) |
| 8 | 30A | Ignition switch, Starter solenoid |
| 9 | 20A | Engine management |
| 10 | 1A | Battery voltage sense |
| 11 | 30A | Subwoofer |
| 12 | 15A | Fuel pump motor |
| 13 | – | Not used |
| 14 | – | Not used |
| 15 | 20A | ABS (valves) |
| 16 | 10A | Low beam (left-hand side) |
| 17 | 10A | Low beam (right-hand side) |
| 18 | 15A | Heated Exhaust Gas Oxygen (HEGO) sensors |
| 19 | 40A | Heater blower motor |
| 20 | 10A | Engine module (KAP) |
| 21 | 10A | A/C |
| 22 | 20A | Daytime Running Lights (DRL) |
| 23 | – | Not used |
| 24 | 30A | Anti-lock Brake System (ABS) (pumps) |
| 25 | – | Not used |
| 26 | 15A | Fog lamps |
| 27 | 15A | High beams |
| 28 | – | Not used |
| 29 | 10A | ABS module, Speed control |
| R1 | – | Ignition relay |
| R2 | – | Air pump motor relay (PZEV engine only) |
| R3 | – | Cooling fan (high-speed) |
| R4 | – | Cooling fan (low-speed) |
| R5 | – | High beams relay, Fog lamps |
| R6 | – | Low beams relay |
| R7 | – | Fuel pump relay |
| R8 | – | Engine management relay |
| R9 | – | Cooling fan relay |
| R10 | – | Cooling fan relay |
| R11 | – | A/C clutch solenoid relay |
| R12 | – | DRL relay |
| R13 | – | Not used |
| R14 | – | Not used |
| R15 | – | Not used |
| R16 | – | Not used |
| D1 | – | PCM diode |
| D2 | – | Not used |
| D3 | – | A/C clutch diode |
| D4 | – | Not used |
2006
Passenger Compartment Fuse Panel
List of fuses in the passenger compartment fuse panel (2006)
| № | A | Description |
|---|---|---|
| R17 | – | Starter relay |
| R18 | – | Not used |
| R19 | – | Not used |
| R20 | – | Not used |
| R21 | – | Daytime running lamps |
| R22 | – | Not used |
| R23 | – | Not used |
| R24 | – | Not used |
| R25 | – | Rear defrost/Heated mirror relay |
| 30 | 10A | Parking lamps |
| 31 | 20A | Radio |
| 32 | 15A | Turn signal (GEM) |
| 33 | 20A | Sunroof |
| 34 | 20A | Horn |
| 35 | 7.5A | A/C switch, Instrument cluster |
| 36 | 7.5A | Interior lamps, Power mirrors |
| 37 | – | Not used |
| 38 | – | Not used |
| 39 | 2A | PCM relay coil |
| 40 | 25A | Rear defroster |
| 41 | – | Not used |
| 42 | 10A | Stop lamps, Shift interlock |
| 43 | 15A | Rear wiper, Sunroof (ignition) |
| 44 | – | Not used |
| 45 | 7.5A | Recirculated air, Air conditioning |
| 46 | – | Not used |
| 47 | 20A | Cigar lighter/Power point |
| 48 | 10A | Data link connector |
| 49 | 7.5A | Heated mirror, Heated backlite indicator |
| 50 | 10A | Back- up lamps (automatic transaxle only) |
| 51 | 7.5A | Front passenger sensing system |
| 52 | 15A | Heated seats |
| 53 | 10A | Back-up lamps (manual transaxle only), Speed control |
| 54 | 25A | Rear power Windows |
| 55 | 25A | Front power Windows |
| 56 | 20A | Front wipers |
| 57 | 7.5A | Radio and cluster (accessory) |
| 58 | – | Not used |
| 59 | 7.5A | Light switch (headlamps) |
| 60 | 7.5A | Air bag module |
| 61 | 7.5A | PATS modules, Instrument cluster |
| 62 | 7.5A | Radio (Start) |
| 63 | 20A | Power locks (GEM) (Fuse 63 is located on the back of the fuse panel. See your authorized dealer for service of this fuse.) |
Power Distribution Box
List of fuses in the power distribution box (2006)
| № | A | Description |
|---|---|---|
| 1 | 40A | Main power supply (to passenger compartment fuse panel) |
| 2 | – | Not used |
| 3 | – | Not used |
| 4 | 30A | Air pump motor (PZEV engine only) |
| 5 | 30A | Anti-lock Brake System (ABS) (pumps) |
| 6 | 50A | Engine cooling fan (Primary fuse) |
| 7 | 40A | Main power supply (to passenger compartment fuse panel) |
| 8 | 30A | Ignition switch, Starter solenoid |
| 9 | 20A | Engine management |
| 10 | 1A | Battery voltage sense |
| 11 | 30A | Subwoofer |
| 12 | 15A | Fuel pump motor |
| 13 | 20A | Anti-lock Brake System (ABS) (valves) |
| 14 | – | Not used |
| 15 | – | Not used |
| 16 | 10A | Low beam (left-hand side) |
| 17 | 10A | Low beam (right-hand side) |
| 18 | 15A | Heated Exhaust Gas Oxygen (HEGO) sensors |
| 19 | 40A | Heater blower motor |
| 20 | 10A | Engine module (KAP) |
| 21 | 10A | A/C |
| 22 | 20A | Low beams |
| 23 | 15A | High beams, Fog lamps |
| 24 | – | Not used |
| 25 | – | Not used |
| 26 | – | Not used |
| 27 | – | Not used |
| 28 | – | Not used |
| 29 | 10A | ABS module, Speed control |
| R1 | – | Ignition relay |
| R2 | – | High beam relay, Fog lamps relay |
| R3 | – | Cooling fan (high-speed) |
| R4 | – | Cooling fan (low-speed) |
| R5 | – | A/C relay |
| R6 | – | Low beams relay |
| R7 | – | Fuel pump relay |
| R8 | – | Engine management relay |
| R9 | – | Cooling fan relay |
| R10 | – | Cooling fan relay |
| R11 | – | Not used |
| R12 | – | Not used |
| R13 | – | Not used |
| R14 | – | Not used |
| R15 | – | Air pump motor relay |
| R16 | – | Not used |
| D1 | – | Not used |
| D2 | – | Not used |
| D3 | – | A/C clutch diode |
| D4 | – | Not used |
2007
Passenger Compartment Fuse Panel
List of fuses in the passenger compartment fuse panel (2007)
| № | A | Description |
|---|---|---|
| R17 | – | Starter relay |
| R18 | – | Not used |
| R19 | – | Not used |
| R20 | – | Not used |
| R21 | – | Daytime running lamps |
| R22 | – | Not used |
| R23 | – | Not used |
| R24 | – | Not used |
| R25 | – | Rear defrost/Heated mirror relay |
| 30 | 10A | Parking lamps |
| 31 | 20A | Radio |
| 32 | 15A | Turn signal (GEM) |
| 33 | 20 A | Sunroof |
| 34 | 20 A | Horn |
| 35 | 7.5A | A/C switch, Instmment cluster |
| 36 | 7.5A | Interior lamps, Power mirrors |
| 37 | – | Not used |
| 38 | – | Not used |
| 39 | 2A | PCM relay coil |
| 40 | 25A | Rear defroster |
| 41 | – | Not used |
| 42 | 10A | Stop lamps, Shift interlock |
| 43 | 15A | Rear wiper, Sunroof (ignition) |
| 44 | 15A | Daytime Running Lamps (DRL) |
| 45 | 7.5A | Recirculated air, Air conditioning |
| 46 | – | Not used |
| 47 | 20 A | Cigar lighter/Power point |
| 48 | 10A | Data link connector |
| 49 | 7.5A | Heated mirror, Heated backlite indicator |
| 50 | 10A | Back- up lamps (automatic transaxle only) |
| 51 | 7.5A | Front passenger sensing system |
| 52 | 15A | Heated seats |
| 53 | 10A | Back-up lamps (manual transaxle only), Speed control |
| 54 | 25A | Rear power Windows |
| 55 | 25A | Front power Windows |
| 56 | 20 A | Front wipers |
| 57 | 7.5A | Radio and cluster (accessory) |
| 58 | – | Not used |
| 59 | 7.5A | Light switch (headlamps) |
| 60 | 7.5A | Air bag module |
| 61 | 7.5A | PATS modules, Instrument cluster |
| 62 | 7.5A | Radio (Start) |
| 63 | 20A | Power locks (GEM) (Fuse 63 is located on the back of the fuse panel. See your authorized dealer for service of this fuse.) |
Power Distribution Box
List of fuses in the power distribution box (2007)
| № | A | Description |
|---|---|---|
| 1 | 40A | Main power supply (to passenger compartment fuse panel) |
| 2 | – | Not used |
| 3 | – | Not used |
| 4 | 30A | Air pump motor (PZEV engine only) |
| 5 | 30A | Anti-lock Brake System (ABS) (pumps) |
| 6 | 50A | Engine cooling fan (Primary fuse) |
| 7 | 40A | Main power supply (to passenger compartment fuse panel) |
| 8 | 30A | Ignition switch, Starter solenoid |
| 9 | 20A | Engine management |
| 10 | 1A | Battery voltage sense |
| 11 | 30A | Subwoofer |
| 12 | 15A | Fuel pump motor |
| 13 | 20A | Anti-lock Brake System (ABS) (valves) |
| 14 | – | Not used |
| 15 | – | Not used |
| 16 | 10A | Low beam (left-hand side) |
| 17 | 10A | Low beam (right-hand side) |
| 18 | 15A | Heated Exhaust Gas Oxygen (HEGO) sensors |
| 19 | 40A | Heater blower motor |
| 20 | 10A | Engine module (KAP) |
| 21 | 10A | A/C |
| 22 | 20A | Low beams |
| 23 | 15A | High beams, Fog lamps |
| 24 | – | Not used |
| 25 | – | Not used |
| 26 | – | Not used |
| 27 | – | Not used |
| 28 | 1A | ABS module |
| 29 | 10A | Speed control |
| R1 | – | Ignition relay |
| R2 | – | High beam relay, Fog lamps relay |
| R3 | – | Cooling fan (high-speed) |
| R4 | – | Cooling fan (low-speed) |
| R5 | – | A/C relay |
| R6 | – | Low beams relay |
| R7 | – | Fuel pump relay |
| R8 | – | Engine management relay |
| R9 | – | Cooling fan relay |
| R10 | – | Cooling fan relay |
| R11 | – | Not used |
| R12 | – | Not used |
| R13 | – | Not used |
| R14 | – | Not used |
| R15 | – | Air pump motor relay |
| R16 | – | Not used |
| D1 | – | Not used |
| D2 | – | Not used |
| D3 | – | A/C clutch diode |
| D4 | – | Not used |
Conclusion
Knowing the fuse box and relay locations on your 2005–2007 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 notice significant wear on the fuse box connectors, consulting a mechanic experienced with older Ford Focus models is a smart next step
