In this comprehensive guide, we will explore the 2003 Ford Expedition fuse box diagram, providing you with an overview of the fuse box layout and its associated components. Explaining the functions of each fuse, to make it easier for you to understand your vehicle’s electrical system, and empowering you with the knowledge to troubleshoot electrical issues.
Table of Contents
Note: All information contained in this Quick Reference Guide was accurate at the time of duplication. For detailed operating and safety information, please consult your Owner’s Manual.
The electrical system within your vehicle holds paramount importance, as it serves as the life force that powers a multitude of functions, ultimately contributing to a smooth and efficient driving experience. Acting as a vigilant guardian, the fuse box assumes a crucial role in protecting the myriad electrical components nestled within your truck, shielding them from any potential harm or malfunctions. With meticulous precision, the fuse box carefully distributes electrical currents, diligently warding off the risks of overloads and shorts. In doing so, it upholds the integrity and optimal functioning of essential components such as lights, wipers, radio, and various other critical elements that contribute to your vehicle’s overall performance.
It serves as a roadmap, providing clear directions to effortlessly identify and locate specific fuses within the system. By consulting the diagram, you can gain a thorough understanding of the unique amperage ratings assigned to each fuse, enabling you to make informed decisions when it comes to troubleshooting and maintenance. Furthermore, the diagram allows you to establish the precise circuits associated with each fuse, shedding light on the interconnections within the electrical system and facilitating efficient diagnosis and resolution of electrical issues.
Note: If a fuse blows or a circuit breaker opens, all parts connected to that circuit will stop working. Taking the time to inspect and replace faulty fuses can save you from unnecessary repairs and potential hazards, ensuring the smooth operation of your vehicle's electrical components.
2003 Ford Expedition Passenger compartment fuse panel/power distribution box
Explore beneath the right side of your instrument panel to reveal the hidden fuse panel. This secret treasure awaits your discovery, nestled in its modest domicile. However, before you can see its hidden riches, you must first remove the trim panel and fuse box cover. Take care when you unscrew the trim panel, displaying the fuse box cover like a valuable pearl. This cover acts as a protective shield, shielding the fuses from inquisitive eyes and potential disasters. When you remove this protective barrier, you will gain entry to the inner sanctum of the fuse panel, where a world of electrical marvels awaits your meticulous investigation and rigorous maintenance.
Note: In the event that you need to disconnect and reconnect the battery, it's important to note that certain features may require resetting. This step is necessary to restore their functionality.
Carefully remove the cover on the gateway to the fuse box to unlock it. As seen in the above figure, place your finger behind the distinctive PULL tab and your thumb gently above it to perform a delicate finger-thumb dance. The exquisite arrangement of fuses inside is revealed when the cover is gently pulled back. As you begin this attempt, you enter a realm where electrical circuits merge and are waiting to be discovered and comprehended.
Putting the fuse box lid back where it belongs will complete the reassembly and give you a great sense of accomplishment. Start by precisely aligning the top portion of the cover with the fuse panel by carefully putting it there. Apply pressure to the bottom of the cover with a soft but firm touch, moving it into place until you hear the reassuring click that denotes a secure closing. Take a moment to see the harmonious union between the cover and the panel, which protects the electrical components inside. Use a moderate pull on the cover to check the stability and alignment to ensure appropriate seating.
2003 Ford Expedition Fuse Box Diagram Chart
The fuses are coded as follows.
* Mini Fuses / ** Maxi Fuses
| Fuse/RelayLocation | Fuse AmpRating | Passenger Compartment FusePanel Description |
| 1 | 10A* | Run/Accessory – Front wiper motor, Instrument cluster, Rear wiper motor, Tire Pressure Monitor System (TPMS) module |
| 2 | 20A* | Turn signal/Hazard flasher, Stop lamp switch, IVD(AdvanceTrac) stop lamps relay, Stoplamps, Center high-mount stop light (CHMSL), Turn signal lamps |
| 3 | 7.5A* | Power mirror switch, Power mirrors (non-memory), Driver seat switch (memory), Memory module (logic power) |
| 4 | 15A* | DVD player, Rear seat audio controls, CDDJ (navigation radio) |
| 5 | 7.5A* | Powertrain Control Module (PCM) (KA power), Speed control deactivation switch, Manual climate control mode switch, Stoplamp switch, Brake-shift interlock (BSI) solenoid, EATC control head, Body Security Module (BSM) (KA power), Speed control servo, 3rd-row seat relay coils, SecuriLock LED |
| 6 | 15A* | Headlamp switch (park lamps and switch backlight feed), Parklamps, License plate lamps, Foglamp relay coil, Trailer tow electric brake controller (illumination), BSM (auto lamp, park lamps)Foglamp indicator |
| 7 | 7.5A* | Radio (start signal) |
| 8 | 10A* | Rear window defroster switch, Rear window defroster indicator (climate control head), Heated outside mirrors |
| 9 | — | Not used |
| 10 | 20A* | Trailer tow back-up lamps relay, Trailer tow 7–wire connector (back-up lamps), Trailer tow park lamp relay, Trailer tow 7– and 4–pin connectors (park lamps) |
| 11 | 10A* | A/C compressor clutch relay, A/C compressor clutch solenoid, Air suspension compressor relay, 4×4 Integrated Wheel Ends (IWE) solenoid |
| 12 | 10A* | Speed control servo, Speed control relay |
| 13 | 10A* | Manual climate control mode switch, Rear window defroster relay coil, A/C refrigerant containment switch, A/C compressor thermistor, DEATC control head, DEATC solenoids, DEATC blower control, Trailer tow battery charge relay coil |
| 14 | 10A* | Daytime Running Lamps (DRL)ignition relay coil, DigitalTransmission Range Sensor (DTRS) back-up lamps, Trailer tow backup lamps relay coil, Electrochromatic mirror, Navigation radio, Manual A/C blend door actuator |
| 15 | 5A* | AdvanceTrac switch, Instrument cluster (Run/Start feed) |
| 16 | 10A* | ABS/AdvanceTrac module(Run/Start feed) |
| 17 | 15A* | Foglamps |
| 18 | 10A* | Auxiliary A/C temperature blend door actuator, Auxiliary A/C front auxiliary control, Turn signal flasher, Electrochromatic mirror, Auxiliary mode motor, Climate controlled seat modules |
| 19 | 10A* | Restraints Control Module (RCM) |
| 20 | 30A* | Air suspension module (air spring solenoids and height sensors), 4×4 module |
| 21 | 15A* | Instrument cluster (B+), Interior(courtesy) lamps, Puddle lamps(outside mirrors), Tire Pressure Monitoring System (TPMS) module |
| 22 | 10A* | Moonroof switch illumination, Radio (delayed accessory feed), Flip window switch, Flip window motors, EHAM antenna amplifier(navigation radio) |
| 23 | 10A* | RH low beam |
| 24 | 15A* | Interior demand lamps (front map/dome lamp, 2nd-row dome/map lamp, glove compartment lamp, cargo lamp, roof rail lamps, vanity mirror lamps), Battery saver relay coil, Battery saver relay power |
| 25 | 10A* | LH low beam |
| 26 | 20A* | Horn relay, Horns |
| 27 | 5A* | Compass module, Reverse sensing system module, Brake shift interlock (BSI) solenoid, Overdrive cancel switch, Air suspension module (Run/Start sense) |
| 28 | 5A* | PCM relay coil, Speed control relay coil, SecuriLock transceiver |
| 29 | 30A* | Trailer tow electric brake controller, Trailer tow 7–wire connector (electric brake) |
| 30 | 30A* | BSM (door locks, liftgate glass release relay), Liftgate glass release motor, Door/Liftgate lock motors |
| 31 | 25A* | Radio (B+), Subwoofer |
| 32 | 15A* | Catalyst Monitor Sensors (CMS), Transmission solenoids |
| 33 | 20A* | Canister vent solenoid, HEGO sensors, VMV solenoid, Intake Manifold Tuning Valve (IMTV-4.6L engine) solenoid, A/C compressor clutch relay coil, EGR vacuum regulator (EVR) solenoid |
| 34 | 20A* | PCM, Fuel injectors, Fuel pump relay, Fuel pump shut-off switch, Fuel pump motor, Idle air control(IAC) solenoid, Mass Air Flow(MAF) sensor |
| 35 | 20A* | Instrument cluster high beam indicator, High beam headlamps |
| 36 | 10A* | Trailer tow right turn/stop lamps |
| 37 | 20A* | Cargo area powerpoint |
| 38 | 25A* | Rear wiper motor, Washer pump(rear window wash) |
| 39 | 20A* | Console power points (front and rear of console), Instrument panel powerpoint (bench seat) |
| 40 | 20A* | DRL relays, DRL foglamps, DRL headlamp relay coil, Headlamp switch (headlamps), Multifunction switch (flash-to-pass), BSM (auto lamp headlamps relay), High beam relay coil, Fuse 25 (LH low beam), Fuse 23 (RH low beam) |
| 41 | 20A* | Cigar lighter, OBD II diagnostic connector |
| 42 | 10A* | Trailer tow left turn/stop lamps |
| 101 | 30A** | Starter motor relay, Starter motor solenoid |
| 102 | 30A** | Ignition switch power |
| 103 | 30A** | ABS/AdvanceTrac module(pump motor) |
| 104 | 30A** | LH 3rd row seat relay, LH 3rd row seat switch, LH 3rd row seat motor |
| 105 | 40A** | Spare |
| 106 | 30A** | Trailer tow battery charge relay, Trailer tow 7–way connector(battery charge) |
| 107 | 30A** | Auxiliary A/C blower relay,Auxiliary A/C blower motor |
| 108 | 30A** | Passenger seat motor switch |
| 109 | 30A** | Driver seat motor switch(non-memory), Memory module, Power memory mirrors, Adjustable pedals switch, and motor |
| 110 | 30A** | Spare |
| 111 | 50A** | Air suspension compressor, Air suspension compressor relay |
| 112 | 30A** | ABS/AdvanceTrac module(valves) |
| 113 | 30A** | Front wiper motor, Washer pump(windshield wash) |
| 114 | 40A** | Rear window defroster relay, Rear window defroster grid, Heated mirrors (Fuse 8) |
| 115 | 30A** | 4×4 module, Transfer case shift motor |
| 116 | 40A** | Front blower motor relay, Front blower motor |
| 117 | 30A** | RH 3rd row seat relay, RH 3rd row seat switch, RH 3rd row seat motor |
| 118 | 30A** | Driver and passenger climate control seat module |
| 401 | 30A** | Power windows (circuit breaker), Main window switch, Window motors, Window switches, Moonroof module |
| R01 | Starter relay | Starter motor solenoid |
| R02 | Delayed accessory relay | Fuse 22, CB 401, Power windows, Switch backlighting, Radio, Moonroof, Flip windows, DVD, Navigation antenna amplifier |
| R03 | Hi-beam relay | Fuse # 35, Hi-beam headlamps, Hi-beam indicator |
| R04 | Rear window defrost relay | Fuse 8 (heated mirrors), Rear window defroster, Heated outside mirrors, Rear window defroster indicator (climate control head) |
| R05 | Trailer tow battery charge relay | Trailer tow 7–wire connector(battery charge) |
| R06 | Front blower relay | Front blower motor |
| R201 | Trailer tow park lamp relay | Trailer tow 7–wire and 4–wire connectors (park lamps) |
| R202 | Foglamp relay | Front fog lamps |
| R203 | PCM relay | Fuse 32, Fuse 33, Fuse 34, Fuel pump relay, Fuel pump, PCM solenoids, and sensors |
| R301 | Trailer tow backup lamp relay | Trailer tow 7–wire connector(backup lamps) |
| R302 | Speed control relay | Speed control servo |
| R303 | Fuel pump relay | Fuel pump shut-off switch, PCM(fuel pump monitor), Fuel pump |
| R304 | Battery saver relay | Roof rail lamps, Vanity mirror lamps, Map/Dome lamp, Glove box lamp, Cargo area lamp, Outside mirror puddle lamps, Instrument cluster (interior lamps) |
| R305 | Horn relay | Dual note horn |
2003 Ford Expedition Standard fuse amperage rating and color
| Fuse rating | Mini fuses | Standard fuses | Maxi fuses | Cartridge maxi fuses | Fuse link cartridge |
| 2A | Grey | Grey | — | — | — |
| 3A | Violet | Violet | — | — | — |
| 4A | Pink | Pink | — | — | — |
| 5A | Tan | Tan | — | — | — |
| 7.5A | Brown | Brown | — | — | — |
| 10A | Red | Red | — | — | — |
| 15A | Blue | Blue | — | — | — |
| 20A | Yellow | Yellow | Yellow | Blue | Blue |
| 25A | Natural | Natural | — | — | — |
| 30A | Green | Green | Green | Pink | Pink |
| 40A | — | — | Orange | Green | Green |
| 50A | — | — | Red | Red | Red |
| 60A | — | — | Blue | — | Yellow |
| 70A | — | — | Tan | — | Brown |
| 80A | — | — | Natural | — | Black |
Explore more: 2023 Ford Expedition Fuse Box Diagram. 2022 Ford Expedition Fuse Box Diagram. 2021 Ford Expedition Fuse Box Diagram. 2020 Ford Expedition Fuse Box Diagram. 2019 Ford Expedition Fuse Box Diagram. 2018 Ford Expedition Fuse Box Diagram. 2017 Ford Expedition Fuse Box Diagram. 2016 Ford Expedition Fuse Box Diagram. 2015 Ford Expedition Fuse Box Diagram. 2014 Ford Expedition Fuse Box Diagram. 2013 Ford Expedition Fuse Box Diagram. 2012 Ford Expedition Fuse Box Diagram. 2011 Ford Expedition Fuse Box Diagram. 2010 Ford Expedition Fuse Box Diagram. 2009 Ford Expedition Fuse Box Diagram. 2008 Ford Expedition Fuse Box Diagram. 2007 Ford Expedition Fuse Box Diagram. 2006 Ford Expedition Fuse Box Diagram. 2005 Ford Expedition Fuse Box Diagram. 2004 Ford Expedition Fuse Box Diagram. 2002 Ford Expedition Fuse Box Diagram. 2001 Ford Expedition Fuse Box Diagram. 2000 Ford Expedition Fuse Box Diagram. 1999 Ford Expedition Fuse Box Diagram. 1998 Ford Expedition Fuse Box Diagram. 1997 Ford Expedition Fuse Box Diagram.
Conclusion
In conclusion, the 2003 Ford Expedition Fuse Box Diagram serves as an invaluable resource for owners and mechanics alike. It provides a comprehensive overview of the fuse box layout and helps identify the correct fuses for various electrical components. With this diagram, troubleshooting electrical issues becomes more manageable, ensuring that repairs and maintenance are carried out effectively.
By understanding the fuse box diagram, owners can save time and money by pinpointing and replacing blown fuses themselves. This knowledge empowers them to tackle minor electrical problems without having to visit a mechanic, promoting self-reliance and cost-efficiency.
However, while the 2003 Ford Expedition Fuse Box Diagram is a valuable resource for troubleshooting electrical issues, it is important to recognize that not all problems can be easily solved by simply replacing a fuse. In some cases, complex electrical problems may arise that require the expertise of professionals.
