Ford F-150 2003 Fuse Box Info
Fuse box location:
The fuse box is located below and to the left of the steering wheel by the brake pedal.
Engine compartment fuse box:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 15A | Audio |
| 2 | 5A | Powertrain Control Module (PCM), Cluster |
| 3 | 20A | Cigar Lighter, Data Link Connector |
| 4 | 5A | Power mirror switch, Mirror turn signal relays |
| 5 | 15A | Speed control module, Reverse lamp, Climate mode switch, Daytime Running Lamps (DRL) relay, Digital Transmission Range (DTR) sensor |
| 6 | 5A | Cluster, Brake shift interlock solenoid, GEM |
| 7 | - | Not used |
| 8 | 5A | Radio, Remote entry module, GEM, In-vehicle entertainment system (SuperCrew only) |
| 9 | - | Not used |
| 10 | - | Not used |
| 11 | 30A | Front washer pump relay, Wiper run/park relay, Wiper HI/LO relay, Windshield wiper motor |
| 12 | - | Not used |
| 13 | 20A | Stop Lamp Switch (Lamps), Turn/Hazard Flasher |
| 14 | 15A | Battery Saver Relay, Interior Lamp Relay |
| 15 | 5A | Stop lamp switch (speed control, brake shift interlock), GEM, Rear Anti-lock Brake System (RABS) module |
| 16 | 20A | Headlamps (Hi Beams), Cluster (Hi Beam Indicator) |
| 17 | - | Not used |
| 18 | 5A | Instrument Illumination (Dimmer Switch Power) |
| 19 | - | Not used |
| 20 | 5A | Audio, GEM Module, Powertrain Control Module (PCM), Transmission Range Sensor |
| 21 | 15A | Digital Transmission Range (DTR) Sensor, Clutch Switch, Starter Relay, I/P fuse 20 |
| 22 | 10A | Air Bag Module, Passenger Airbag Deactivation Module |
| 23 | 10A | Trailer tow battery Charge relay, Turn/Hazard flasher, 4x4 solenoids, 4x4 relays, Overhead console, 4–Wheel Anti-lock Brake System (4WABS) module, EC mirror, Heated seats |
| 24 | 10A | Function Selector Switch Assembly |
| 25 | 10A | Heated mirrors |
| 26 | 10A | Right-hand low beam headlamp |
| 27 | 5A | Foglamp relay and foglamp indicator, Main light switch (upstream) |
| 28 | 10A | Left-hand low beam headlamp |
| 29 | 5A | Autolamp module, Transmission overdrive control switch, Central security module, Beltminder |
| 30 | 30A | Passive Anti-theft transceiver, Cluster, Ignition coils, PCM relay, Coil on plugs, Radio noise capacitor, ECC diode |
| 31 | - | Not used |
| RELAY 1 | Interior Lamp Relay | |
| RELAY 2 | Battery Saver Relay | |
| RELAY 3 | Not used | |
| RELAY 4 | One Touch Down Window Relay | |
| RELAY 5 | ACC Delay Relay |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 20A | Power Point |
| 2 | 30A | Powertrain Control Module (PCM) |
| 3 | 30A | Main Light Switch, Headlamp Relay, Multifunction Switch |
| 4 | 20A | Console power point (Harley Davidson only) |
| 5 | 20A | Trailer tow back-up/park lamps |
| 6 | 15A | Main Light Switch, Park Lamp Relay |
| 7 | 20A | Horn |
| 8 | 15A | Power door locks, Central Security Module (CSM), Lock relays (not used on SuperCrew) |
| 9 | 15A | Daytime Running Lamps (DRL), Fog Lamps |
| 10 | 20A | Fuel Pump |
| 11 | 20A | Alternator Field |
| 12 | 20A | Rear auxiliary power point (SuperCrew only) |
| 13 | 15A | A/C Clutch |
| 14 | - | Not used |
| 15 | 10A | Running Board Lamps |
| 16 | 15A | Bi-fuel injector module, fuel selector switch and alternative fuel injectors (Bi-fuel vehicles only) |
| 17 | - | Not used |
| 18 | 15A | PCM, Fuel injectors, Fuel pump relay, Mass air flow sensor |
| 19 | 10A | Trailer/Camper adapter (right stop/turn lamp) |
| 20 | 10A | Trailer/Camper adapter (left stop/turn lamp) |
| 21 | - | Not used |
| 22 | - | Not used |
| 23 | 15A | HEGO Sensor, Automatic Transmission |
| 24 | - | Not used |
| 101 | 30A | Trailer Tow Battery Charge |
| 102 | 50/20A | Four-wheel Anti-lock Brake System (4WABS) module/Rear-wheel Anti-lock Brake System (RABS) module, Ignition switch |
| 103 | 50A | Central Junction Box |
| 104 | 30A | 4x4 Shift Motor & Clutch |
| 105 | 40A | Climate Control Front Blower |
| 106 | 20A | Inter Cooler Pump (Supercharged engine only) |
| 107 | - | Not used |
| 108 | 30A | Trailer Tow Electric Brake |
| 109 | - | Not used |
| 110 | 30A | Accessory delay relay (Not used on SuperCrew) |
| 111 | 40A | Ignition Switch Battery Feed (Start and Run Circuits) |
| 112 | 30A | Drivers Power Seat, Adjustable Pedal switch |
| 113 | 40A | Ignition Switch Battery Feed (Run and Accessory Circuits) |
| 114 | - | Not used |
| 115 | 20A | Power door locks (SuperCrew only) |
| 116 | 40A | Heated backlight |
| 117 | 40A | Audiophile radio (SuperCrew only) |
| 118 | 30A | Heated Seats |
| 201 | - | Trailer Tow Park Lamp Relay |
| 202 | - | Front Wiper Run/Park Relay |
| 203 | - | Trailer Tow Backup Lamp Relay |
| 204 | - | A/C Clutch Relay |
| 205 | - | Horn Relay |
| 206 | - | Fog Lamp Relay |
| 207 | - | Front Washer Pump Relay |
| 208 | - | Inter Cooler Pump Relay (Supercharged engine only) |
| 209 | - | Front Wiper Hi/Lo Relay |
| 301 | - | Fuel Pump Relay |
| 302 | - | Trailer Tow Battery Charge Relay |
| 303 | - | Heated backlight relay (SuperCrew only) |
| 304 | - | Powertrain Control Module Relay |
| 305 | - | Fuel Pump Hi/Lo Relay (Supercharged engine only) |
| 306 | - | Inertia Switch Relay (Supercharged engine only) |
| 401 | - | Not used |
| 501 | - | Powertrain Control Module Diode |
| 502 | - | A/C Compressor Diode |
| 503 | - | Not used |
| 601 | 30A CB | Power windows, Moonroof (SuperCrew only) |
| 602 | - | Not used |
