2003 Ford Expedition Fuse Box Diagram: Full Charts by Panel
Your 2003 Ford Expedition has two fuse boxes. The passenger compartment panel is under the right side of the instrument panel, fuses 1 through 42. The power distribution box is under the hood, fuses 101 through 118 plus fuse 401.
The cigarette lighter is fuse 41, rated 20A. It also feeds the OBD II connector.
Prime for Young Adults — 6 Months Free
Students and 18–24s get six months of Prime free, then half price.
Start 6 Months Free As an Amazon Associate I earn from qualifying purchases.One warning before you trust any chart for this truck. Ford moved several of these fuses twice before the body style changed again in 2007. Skip to what changed by year if your truck is a 2004, 2005 or 2006 instead.
Where are the fuse boxes on a 2003 Ford Expedition?
Recommended Best Deal Products
Passenger compartment fuse panel. Under the right side of the instrument panel. Place a finger behind the PULL tab on the cover and pull it toward you. Swing the panel away to reach the fuses behind it.
Power distribution box. Under the hood, in the engine compartment. It carries the high current circuits. That means the starter relay, the ABS pump, the front blower motor and the air suspension compressor.
Worth knowing: none of my three sources state which side of the engine bay the box sits on. Your box cover label is the final authority here, and on any fuse this chart does not match.
Does a 2003 Expedition use the same fuses as a 2004 to 2006 Expedition?
No, not on every position. This is the same generation, body style U222, built 2003 through 2006 before Ford redesigned the Expedition again for 2007. I expected one shared table. Ford renumbered eight circuits inside that single generation instead.
Most published charts for this truck do not say that. I checked two of the largest, fuseandrelay.com and autogenius.info. Both publish one table under a page titled “2003 to 2006.” Both match the 2005 to 2006 values, not your 2003 truck.
A 2003 owner who trusts either chart gets the wrong amperage on four positions. Three more positions show the wrong circuit entirely.
| Fuse | 2003 | 2004 | 2005 to 2006 |
|---|---|---|---|
| 1 | 10A: wipers, cluster, TPMS | 10A: wipers, cluster, TPMS | 7.5A: wipers, cluster. TPMS dropped from this fuse |
| 4 | 10A: DVD player, rear audio, CD changer | 15A: DVD player, rear audio, navigation radio | 15A: same as 2004 |
| 7 | 7.5A: radio | 7.5A: radio start signal | 5A: radio start signal |
| 9 | 10A: alternator | Not used | Not used |
| 12 | 10A: speed control servo and switch | 10A: speed control servo and relay | 15A: fuel pump relay, shut-off switch, driver module, motor |
| 30 | 30A: body module door locks, liftgate glass release | 30A: same circuits as 2003 | 25A: air suspension module, 4×4 transfer case clutch |
| 33 | 20A: canister vent solenoid, HEGO sensors | 20A: same as 2003 | Not used |
| 34 | 20A: PCM, fuel injectors, idle air control, MAF sensor | 20A: adds fuel pump relay, shut-off switch and motor to the same fuse | 15A: PCM, fuel injectors, MAF sensor. Fuel pump dropped from this fuse |
Every other passenger panel position reads the same across all three years. So does every power distribution box position. The trap sits in exactly these eight fuses, not the whole chart.
Which fuse protects the fuel pump, and why does the answer change by year?
Recommended Best Deal Products
This is the number a generic chart for “2003 to 2006” cannot give you, because the circuit itself moved twice.
On your 2003 Expedition, the fuel pump relay is labeled R303 inside the passenger compartment panel. My source lists it by relay name, not tied to one of the 42 numbered fuses in the public breakdown.
Audible — Listen Free for 30 Days
One free credit a month and thousands of titles included.
Listen Free for 30 Days As an Amazon Associate I earn from qualifying purchases.Ford changed this for 2004. Fuse 34, 20A, now also protects the fuel pump relay, the shut-off switch and the fuel pump motor. It still covers the PCM and the mass airflow sensor too.
By 2005, Ford gave the fuel pump its own dedicated fuse. Fuse 12 moved from 10A speed control duty to 15A. It now covers the fuel pump relay, shut-off switch, driver module and motor on its own. Fuse 34 dropped back to 15A, PCM and injectors only.
If your fuel pump will not prime on a 2003 truck, check relay R303 first. It sits in the passenger panel, not under a numbered fuse.
2003 Ford Expedition passenger compartment fuse chart: fuses 1 to 42
The complete passenger panel, fuse by fuse, for your exact year. Rows marked in red change on a 2004 to 2006 truck. The year comparison above covers exactly what changes.
| Fuse | Amps | Circuit |
|---|---|---|
| 1 | 10A | Front wiper motor, instrument cluster, rear wiper motor, tire pressure monitoring system |
| 2 | 20A | Turn signals, brake switch, hazard flasher, stability system stoplamp relay |
| 3 | 7.5A | Power mirrors, memory seat switch and module |
| 4 | 10A | DVD player, rear seat audio controls, CD changer (becomes 15A in 2004) |
| 5 | 7.5A | Engine control module ignition sense, climate mode switch, brake switch, shift interlock, climate head, speed control, third row seat relay |
| 6 | 15A | Headlamp switch, parking lamps, license plate lamps, trailer brake controller, parklamp relay |
| 7 | 7.5A | Radio |
| 8 | 10A | Rear defroster switch, heated mirrors |
| 9 | 10A | Charging system, alternator (not used from 2004) |
| 10 | 20A | Back-up lamps and relay, trailer parklamp relay |
| 11 | 10A | A/C clutch relay, four wheel drive solenoid |
| 12 | 10A | Speed control servo and controls (becomes fuel pump circuit, 15A, in 2005) |
| 13 | 10A | Climate control heads |
| 14 | 15A | Blend door actuator, daytime running lamp relays, transmission range sensor back-up signal |
| 15 | 5A | Stability system switch, instrument cluster |
| 16 | 10A | ABS module |
| 17 | 15A | Fog lamps |
| 18 | 10A | Auto-dimming mirror, auxiliary A/C, climate seat module, temperature solenoid, turn signal flasher, sun sensor, parking brake relay coil |
| 19 | 10A | Restraints control module, airbags |
| 20 | 30A | Air suspension module, four wheel drive module |
| 21 | 15A | Instrument cluster and interior lamps, parking brake relay, TPMS |
| 22 | 10A | Door lock and moonroof switch lighting, radio delayed power, flip window switch |
| 23 | 10A | Right low beam headlamp |
| 24 | 15A | Battery saver relay, front map and dome lamps, second row lamp, glove box lamp, cargo lamp, rail lamps, vanity lamps, underhood lamp |
| 25 | 10A | Left low beam headlamp |
| 26 | 20A | Horn relay, horns |
| 27 | 5A | Compass, reverse sensing, shift interlock solenoid, overdrive cancel switch, air suspension run and start sense |
| 28 | 5A | SecuriLock transceiver |
| 29 | 30A | Trailer brake controller |
| 30 | 30A | Body module door locks, liftgate glass release relay and motor, door and liftgate locks (becomes 25A air suspension in 2005) |
| 31 | 25A | Radio |
| 32 | 15A | Climate control module, transmission solenoids |
| 33 | 20A | Canister vent solenoid, HEGO sensors (not used from 2005) |
| 34 | 20A | Engine control module, fuel injectors, idle air control solenoid, mass airflow sensor (drops to 15A in 2005) |
| 35 | 20A | High beam indicator, high beam headlamps |
| 36 | 10A | Trailer right turn lamp |
| 37 | 20A | Cargo area power point |
| 38 | 25A | Rear wiper, rear washer pump |
| 39 | 20A | Instrument panel and floor console power point, rear console power point |
| 40 | 20A | Headlamp switch, high beam relay coil, low beam feeds, body module autolamp relay, daytime running lamps |
| 41 | 20A | Cigarette lighter, OBD II connector |
| 42 | 10A | Trailer left turn lamp |
A cheap fuse assortment kit covers both the mini and standard blade sizes in this panel. It costs less than a single dealer fuse and saves a second trip. Any brand meeting the ATO/ATC standard fits.
Power distribution box fuse chart: fuses 101 to 401
Recommended Best Deal Products
The under hood box. These values read the same across 2003, 2004, 2005 and 2006 in every source I checked. There is no year trap here.
| Fuse | Amps | Circuit |
|---|---|---|
| 101 | 30A | Starter relay and solenoid |
| 102 | 30A | Ignition switch, starter solenoid |
| 103 | 30A | ABS and AdvanceTrac with RSC pump motor |
| 104 | 30A | Left third row power seat |
| 105 | 30A | Spare |
| 106 | 30A | Trailer battery charge relay |
| 107 | 30A | Auxiliary blower relay and motor |
| 108 | 30A | Passenger power seat and lumbar switches |
| 109 | 30A | Driver seat motor, lumbar, pedal switch, seat memory module |
| 110 | 30A | Spare |
| 111 | 50A | Air suspension relay and compressor |
| 112 | 30A | ABS and AdvanceTrac with RSC valves |
| 113 | 30A | Front wiper motor, front washer pump |
| 114 | 40A | Rear defrost relay, defroster grid, heated mirrors |
| 115 | 30A | Four wheel drive module, transfer case shift motor |
| 116 | 40A | Front blower relay and front blower motor |
| 117 | 30A | Right third row power seat relay, switch and motor |
| 118 | 30A | Driver and passenger climate seat module |
| 401 | 30A | Power window circuit breaker, window switches and motors, moonroof module |
2003 Ford Expedition symptom to fuse guide
Readers arrive with a symptom, not a fuse number. Start here, then confirm the position in the full charts above.
| Symptom | Check this | Box |
|---|---|---|
| Front cigarette lighter or 12V outlet is dead | Fuse 41, 20A | Passenger panel |
| Floor console or instrument panel power point is dead | Fuse 39, 20A | Passenger panel |
| Cargo area power point is dead | Fuse 37, 20A | Passenger panel |
| Radio is completely dead, no display | Fuse 31, 25A, and fuse 7, 7.5A | Passenger panel |
| Fuel pump will not prime, hard no-start | Relay R303 (2003), fuse 34 (2004), fuse 12 (2005 to 2006) | Passenger panel |
| One low beam headlamp out, bulb tests good | Fuse 23 right or 25 left, 10A | Passenger panel |
| Both high beams out | Fuse 35, 20A | Passenger panel |
| Horn stays silent | Fuse 26 relay, 20A | Passenger panel |
| Front blower will not blow air on any setting | Fuse 116, 40A | Power distribution box |
| Rear window defroster will not clear | Fuse 114, 40A, and fuse 8 for the switch | Both boxes |
| Truck sagging, air suspension warning lamp on | Fuse 111, 50A, and fuse 20, 30A | Both boxes |
| No crank, starter will not engage | Fuse 101 and 102, 30A each | Power distribution box |
| Key will not start truck, SecuriLock light flashing | Fuse 28, 5A | Passenger panel |
| All power windows dead at once | Fuse 401, 30A | Power distribution box |
How do you tell if a fuse is actually blown?
A blown fuse shows a broken metal strip inside the clear plastic body. Pull the fuse and hold it up to a light to check.
A hairline break is easy to miss. Test continuity with a multimeter set to ohms if the strip looks intact. Near zero resistance means the fuse is good.
Never guess the replacement rating. Match the number on the old fuse against your box cover label. A higher rated fuse lets the wiring become the fuse instead, and that failure costs far more to fix.
Audible Premium Plus — Annual Membership
12 audiobook credits up front, plus the full Audible catalogue.
See Annual Plans As an Amazon Associate I earn from qualifying purchases.Why does the same fuse keep blowing?
A fuse that blows once is usually a one-off surge. One that blows again within days is telling you something is wrong upstream, not asking for a bigger fuse.
Unplug whatever you most recently added. A phone charger left in a power point is a common repeat offender. So is an aftermarket amplifier wired into the audio fuses.
Check for chafed insulation where the harness flexes, especially near the liftgate hinge and the driver door jamb.
If a fuse blows the instant you push it in, that circuit has a hard short. Stop replacing fuses and trace the wiring with a proper diagnostic tool instead of guessing. A plastic fuse puller keeps you from cracking the panel housing while you work through the circuit.
Does this chart apply to any other Expedition year?
Only 2003 through 2006. Ford built this body style, U222, for those four years only. The 2007 redesign brought a separate electrical architecture.
If you have a 2007 Expedition or newer, that is the next generation. It carries its own fuse box and its own numbering. See our 2007 Ford Expedition fuse box diagram for that truck.
If you have a 2000 or 2001 Expedition instead, that is the earlier first generation body style. It also carries its own separate layout. See our 2001 Ford Expedition fuse box diagram for that generation.
Within 2003 to 2006, use the year comparison table above. It is the only chart on this page that changes by model year.
2003 Ford Expedition fuse quick reference
The fuses owners look up most, in one place.
| What you want | Fuse | Amps | Box |
|---|---|---|---|
| Cigarette lighter, front power point | 41 | 20A | Passenger panel |
| Cargo area power point | 37 | 20A | Passenger panel |
| Console and instrument panel power point | 39 | 20A | Passenger panel |
| Starter relay | 101, 102 | 30A each | Power distribution box |
| Front blower motor | 116 | 40A | Power distribution box |
| Air suspension compressor | 111 | 50A | Power distribution box |
| Rear window defroster | 114 | 40A | Power distribution box |
| Restraints control module, airbags | 19 | 10A | Passenger panel |
| SecuriLock transceiver | 28 | 5A | Passenger panel |
| Power windows, all | 401 | 30A | Power distribution box |
Not sure your truck matches this exactly? Your box cover label is the final authority, especially on fuse 12 and fuse 34.
Trailer tow, air suspension and third row seating are options that add fuses this guide covers. Your specific build may not use all of them.
