2003 Explorer Fuse Diagram: Exploring the Fuse Boxes
2003 Explorer Fuse Diagram: Find the correct fuse for the circuit
This 2003 Explorer Fuse Diagram shows two fuse boxes: the Battery Junction Box/Power Distribution Box located under the hood and the Smart Junction Box/Passenger Compartment Fuse Panel located under the dash.
To learn more about automotive fuses, see this article
To learn how to check a fuse visually or without removing it, see this article
2003 Explorer Fuse Diagram for Battery Junction Box/Power Distribution Box
The power distribution box is located in the engine compartment on the driver’s side. Find it near the firewall next to the master cylinder and wiper motor. The power distribution box contains high-current fuses that protect your vehicle’s main electrical systems from overloads.
How to find your fuse and the devices served by that fuse
There are 63 fuse/relay slots in the Battery Junction Box. The chart shows only 10 to speed up load time. Here’s how to find the fuse and circuit you want.
1) Change the number of entries showing (in the Show Entries Box) to 100 and scroll the list.
2) Enter the name of the component you’re searching for in the Search box.
3) Use the Next/Previous buttons at the bottom of the table
PJB= Passenger Junction Box
HEGO = Heated Exhaust Gas Oxygen Sensor
VMV= Vapor Mangement Valve
PTEC= Powertrain Electronic Control Module (PCM)
CMS= Central Security Module
BSM= Body Security Module
| Fuse number | Amperage | Circuits protected |
|---|---|---|
| F1 | 60 | Passenger Junction Box |
| F2 | 30 | BSM |
| F3 | — | Not used |
| F4 | 30 | Rear defrost |
| F5 | 40 | Anti-lock Brake System (ABS) pump |
| F6 | 60 | Delayed accessory circuit breaker |
| F7 | 20 | Power point #2 |
| F8 | — | Not used |
| F9 | 20 | Power point #1 |
| F10 | 30 | ABS module (valves) |
| F11 | 40 | PTEC (Powertrain Control Module) |
| F12 | 50 | Ignition relay/Starter relay |
| F13 | 40 | Trailer tow battery, Trailer tow turn signals |
| F14 | 10 | Daytime Running Lamps (DRL) (Canada)/Foglamps (export only) |
| F15 | 15 | Memory (KAPWR) |
| F16 | 15 | Headlamp switch |
| F17 | 20 | 4x4 (v-batt 2) |
| F18 | 20 | 4x4 (v-batt 1) |
| F19 | 20 | High beam relay |
| F20 | 30 | Electric brake |
| F21 | 30 | Front wiper motor |
| F22 | 20 | Autolamp; Low beam |
| F23 | 30 | Ignition switch |
| F24 | — | Not used |
| F25 | — | Not used |
| F26 | 15 | Fuel pump |
| F27 | 20 | Trailer tow lamps |
| F28 | 20 | Horn relay |
| F29 | 60 | Passenger Junction Box |
| F30 | 20 | Rear wiper motor |
| F31 | — | Not used |
| F32 | — | Not used |
| F33 | 30 | Auxiliary blower motor |
| F34 | 30 | Passenger power seat, Adjustable pedals |
| F35 | — | Not used |
| F36 | 40 | Blower motor |
| F37 | 15 | A/C clutch relay/Transmission |
| F38 | 15 | Coil on plug |
| F39 | 15 | Injectors/Fuel pump relay |
| F40 | 15 | PTEC power (Powertrain Control Module) |
| F41 | 15 | HEGO, VMV, CMS, PTEC |
| F42 | 10 | Right low beam |
| F43 | 10 | Left low beam |
| F44 | 15 | Front foglamps |
| F45 | 5 | Brake pressure switch |
| F46 | 20 | High beams |
| F47 | — | Horn relay |
| F48 | — | Fuel pump relay |
| F49 | — | High beam relay |
| F50 | — | Fog lamp relay |
| F51 | — | DRL relay (Canada)/AdvanceTrac relay (U.S.) |
| F52 | — | A/C clutch relay |
| F53 | — | Trailer tow right turn |
| F54 | — | Trailer tow left turn |
| F55 | — | Trailer tow left turn |
| F56 | — | Blower motor relay |
| F57 | — | Starter relay |
| F58 | — | PTEC relay |
| F59 | — | Ignition relay |
| F60 | — | PCM diode |
| F61 | — | A/C clutch diode |
| F62 | 30A circuit breaker | Power windows circuit breaker |
Explorer Fuse Diagram for Cabin/Passenger Compartment Fuse Panel
The cabin fuse panel is located on the far left-hand side of the instrument panel. Ford refers to this as the passenger compartment fuse box or the central junction box (CJB). The panel faces the driver’s door and is covered by a snap-in lid. Pull the panel cover outward to access the fuses.
Top Side with Relays
| Fuse number | Amperage | Circuits protected |
|---|---|---|
| F1 | 30 | Memory seat module, Driver power seat |
| F2 | 20 | Moonroof |
| F3 | 20 | Radio, Amplifier, Power antenna, DVD |
| F4 | 5 | Front wiper module |
| F5 | 15 | Flasher relay (Turn, hazards) |
| F6 | 10 | Right horn |
| F7 | 15 | Heated mirrors |
| F8 | — | Not used (spare) |
| F9 | — | Not used (spare) |
| F10 | 10 | Heated backlight relay coil, A/C clutch contact |
| F11 | 20 | Heated seats |
| F12 | 5 | 4x4 module |
| F13 | 5 | Overdrive cancel switch, Flex fuel sender |
| F14 | 5 | PATS module |
| F15 | 5 | Rear wiper module, Cluster, TPMS |
| F16 | 5 | Power mirror, Manual climate control, TPMS |
| F17 | 15 | Delayed acc. coil, Battery saver, Glove compartment lamp, 2nd row courtesy lamps, Interior lamps (front) |
| F18 | 10 | Left horn |
| F19 | 10 | RCM |
| F20 | 5 | Driver seat switch, Memory switch, Driver seat module, BSM, Sunload sensor |
| F21 | 5 | Instrument cluster, Compass, Flasher coil |
| F22 | 10 | ABS, IVD Controller |
| F23 | 15 | Brake pedal position switch, Driver brake applied relay, Redundant cruise deactivate switch |
| F24 | 15 | Cigar lighter, OBD II |
| F25 | 5 | Mode-Temperature actuator for auxiliary climate control, Trailer tow battery charge coil |
| F26 | 7.5 | Park aid, Brake shift interlock, Approach lamp relay coil, IVD switch |
| F27 | 7.5 | Electrochromatic mirror, Digital transmission range sensor - backup lamps |
| F28 | 5 | Radio (Start)/DVD (Start) |
| F29 | 10 | Digital transmission range sensor, PWR feed to fuse #28 (Start feed) |
| F30 | 5 | Daytime Running Lamps (DRL), Remote solenoid, DEATC climate controller |
2003 Explorer Rear Relay Box
The rear relay box is located on the rear quarter panel (passenger side). To access this box, you must remove the trim panel.
2003 explore rear relay box
15 Trailer tow back- up lamps
19 Trailer tow park lamps
20 Trailer tow battery charge
Other relays are not used in the 2003 model
2003 Explorer Auxiliary relay box (Canadian vehicles equipped with
AdvanceTrac only)
The relay box is located on the front right fender well underneath the speed control module
64 AdvanceTrac relay