When faced with electrical problems, the 2018 Ford Expedition fuse box diagram serves as a helpful tool to locate and replace blown fuses accurately. In this article we will take a deep dive into this invaluable resource. With a exact breakdown of each fuse’s function, we aim to provide you with a comprehensive understanding of how these tiny power guardians contribute to the seamless operation of your vehicle’s electrical components.
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 fuse box in the 2018 Ford Expedition is a centralized location where fuses, which are small devices that protect electrical circuits, are housed. It is responsible for preventing excessive electrical current from flowing through the vehicle’s wiring, thus safeguarding the electrical components from damage or failure.
The fuse box diagram is a visual representation of the fuse box layout, displaying the arrangement and rating of each fuse. It is crucial to understand the diagram to identify the correct fuses for different electrical components in your vehicle.
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.
2018 Ford Expedition Fuse Box Diagram (Engine Compartment)
Installed within the engine compartment of your vehicle lies the power distribution box, a sanctuary for high-current fuses. Acting as stalwart protectors, these fuses assume a critical role in strengthening the main electrical systems against bad overloads, guaranteeing their unhindered operation. Remarkably, the high-current fuses housed within the power distribution box adhere to a unique coding system, an intricate tapestry that unravels the enigma of differentiation and identification among their ranks. Behold, the coded realm of the high-current fuses unfolds as follows:
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. 1Micro fuses / 2M case fuses.
| Fuse Number | Fuse Rating | Protected Component |
| 1 | 25A1 | Horn. |
| 2 | 50A2 | Fan 1. |
| 3 | 30A2 | Front wiper motor. |
| 4 | — | Not used. |
| 5 | 30A2 | Starter relay. |
| 6 | 20A2 | Powerpoint 1. |
| 8 | 20A2 | Powerpoint 2. |
| 10 | 5A1 | Rain sensor. |
| 12 | — | Not used. |
| 13 | 10A1 | 4×4 module. Heated backlite. Heated mirror relay coil. Heated wiper park relay coil. Transmission isolation relay coil. |
| 14 | 15A1 | Transmission control module. |
| 15 | 15A1 | Voltage quality module run/start power. Blindspot information system. Head-Up Display. Image processing module B. Front view camera. Rearview camera. Cruise control module. |
| 16 | 10A1 | Powertrain control module (PCM) run/start feed. |
| 17 | 10A1 | Antilock brake system run/ start feed. |
| 18 | 10A1 | Electronic power assist steering run / start feed. |
| 19 | — | Not used. |
| 20 | 40A2 | Front blower. |
| 21 | 40A2 | Passenger seat motors. |
| 22 | 20A1 | Not used. |
| 23 | 10A1 | Alternator A-line. |
| 24 | 30A2 | Trailer brake control module. |
| 25 | 50A2 | Body control module power 1. |
| 26 | 50A2 | Electronic fan 3. |
| 27 | 40A2 | Driver seat motors. |
| 28 | 15A1 | Rear heated seats. |
| 29 | 10A1 | Integrated wheel end solenoid. |
| 30 | 25A2 | Trailer tow class II-IV battery charge. |
| 31 | 50A2 | Power folding seat module. |
| 32 | 10A1 | A/C clutch. |
| 33 | — | Not used. |
| 34 | — | Not used. |
| 35 | 20A1 | Vehicle power 4. |
| 36 | 10A1 | Vehicle power 3. |
| 37 | 25A1 | Vehicle power 2. |
| 38 | 25A1 | Vehicle power 1. |
| 39 | — | Not used. |
| 41 | 50A2 | Inverter. |
| 43 | 20A2 | Trailer Tow Light Module Class II-IV. |
| 45 | 20A2 | Front/rear washer pump. |
| 46 | 7.5A1 | Family entertainment system. |
| 47 | — | Not used. |
| 48 | — | Not used. |
| 49 | — | Not used. |
| 50 | 30A2 | Fuel pump. |
| 51 | 20A2 | Powerpoint 3. |
| 52 | 50A2 | Body control module (BCM) voltage quality module (VQM). |
| 53 | 25A2 | Trailer tow park lamps relay. |
| 54 | 40A2 | Electronic limited-slip differential relay. |
| 55 | 40A2 | AUX blower. |
| 56 | 20A2 | Powerpoint 4. |
| 58 | 5A1 | Not used (spare). |
| 59 | — | Not used. |
| 60 | 5A1 | Not used (spare). |
| 61 | 25A1 | Not used (spare). |
| 62 | 25A1 | Not used (spare). |
| 63 | 25A1 | 4×4 module. |
| 64 | — | Not used. |
| 65 | — | Not used. |
| 66 | — | Not used. |
| 67 | — | Not used. |
| 69 | — | Not used. |
| 70 | 40A2 | Anti-lock brake system/ parking brake module. |
| 71 | 25A2 | 4×4 module. |
| 72 | — | Not used. |
| 73 | — | Not used. |
| 74 | 10A1 | Trailer tow backup lamps. |
| 75 | — | Not used. |
| 76 | 50A2 | Body control module power 2. |
| 77 | 30A2 | Climate-controlled (Heated/Vented) seat module. |
| 78 | 20A1 | Not used (spare). |
| 79 | — | Not used. |
| 80 | 10A1 | Heated wiper park. |
| 81 | — | Not used. |
| 82 | — | Not used. |
| 83 | 15A1 | Transmission control module power. |
| 84 | — | Not used. |
| 85 | — | Not used. |
| 86 | 5A1 | USB smart charger 5. |
| 87 | 5A1 | USB smart charger 3. |
| 88 | 10A1 | Multi-contour seat relay. |
| 89 | 40A2 | Power running boards. |
| 91 | 30A2 | Power liftgate module. |
| 93 | 15A1 | Heated mirrors. |
| 94 | 5A1 | USB smart charger 1. |
| 95 | 10A1 | USB smart charger 2. |
| 96 | 30A2 | Rear wiper motor relay. |
| 97 | 40A2 | Intercooler puller relay fan. |
| 98 | 15A2 | Transmission oil pump. |
| 99 | 40A2 | Heated backlite. |
| 100 | 20A2 | Powerpoint 5. |
| 101 | 25A2 | Fan 2. |
| 102 | — | Not used. |
| 103 | — | Not used. |
| 104 | — | Not used. |
| 105 | — | Not used. |
| Relay Number | Protected Component |
| R02 | Electric fan 2. |
| R05 | Powertrain Control Module. |
2018 Ford Expedition Fuse Box Diagram (Passenger Compartment)
Undertaking on a quest to discover the hidden sanctuary of the fuse panel. Concealed on the right-hand side of the passenger footwell, obscured by a mysterious trim panel, it awaits your arrival. With ease, you can access and manipulate the fuse panel cover, gaining control over this realm of electrical enchantment.
To access the fuse panel, simply pull the trim panel towards you and swing it away from the side. When reinstalling the trim panel, align the tabs with the grooves on the panel, and firmly push it shut, ensuring a secure fit. This user-friendly process allows for easy removal and reinstallation of the trim panel, providing convenient access to the passenger compartment fuse panel.
3Micro 2 fuses/ 4Micro 3 fuses
| Fuse or Relay Number | Fuse Rating | Protected Component |
| 1 | — | Not used. |
| 2 | 7.5A 3 | Driver seat switch. |
| 3 | 20A3 | Driver door unlock. |
| 4 | 5A3 | Trailer brake controller. |
| 5 | 20A3 | Speaker amplifier. |
| 6 | 10A4 | Not used (spare). |
| 7 | 10A4 | Not used (spare). |
| 8 | — | Not used. |
| 9 | 10A4 | Rear seat entertainment module. Head-up display. |
| 10 | 5A4 | Wireless accessory charger module. Hands-free liftgate module. Power liftgate module. |
| 11 | 5A4 | Keypad. Combined sensor module. |
| 12 | 7.5A4 | Cluster. Electronic control panel. Smart datalink connector logic. |
| 13 | 7.5A4 | Gear shift module. Steering column control module. |
| 14 | 10A4 | Extended power module. Brake switch. |
| 15 | 10A4 | Smart datalink connector power. |
| 16 | 15A3 | Liftglass release. |
| 17 | 5A4 | Telematics control unit – modem. |
| 18 | 5A4 | Ignition switch. Key inhibit solenoid. Push button start switch. |
| 19 | 7.5A4 | Transmission control switch. Gearshift module. |
| 20 | 7.5A4 | Not used. |
| 21 | 5A4 | Humidity and in–car temperature sensor. |
| 22 | 5A4 | Electrochromatic mirror. Second row heated seat module. |
| 23 | 10A3 | Moonroof logic. Inverter. Power window switch. Power mirror switch. |
| 24 | 20A3 | Central lock unlock |
| 25 | 30A3 | Left front door zone module. |
| 26 | 30A3 | Right front door zone module. |
| 27 | 30A3 | Moonroof. |
| 28 | 20A3 | Stereo amplifier. |
| 29 | 30A3 | Left rear door zone module. |
| 30 | 30A3 | Right rear door zone module. |
| 31 | 15A3 | Adjustable pedals. |
| 32 | 10A3 | Humidity and in–car temperature sensor. |
| 33 | 20A3 | Audio control module. |
| 34 | 30A3 | Run/start relay. |
| 35 | 5A3 | Extended power mode module. |
| 36 | 15A3 | Image processing module A. Automated park assist module. Continuous control damping module. |
| 37 | 20A3 | Heated steering wheel. |
| 38 | 30A Circuit Breaker | Left rear power window. Right rear power window. |
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Conclusion
In conclusion, understanding the 2018 Ford Expedition fuse box diagram is essential for any owner to effectively troubleshoot electrical issues and ensure the proper functioning of their vehicle. The fuse box serves as a protective mechanism, preventing electrical overload and damage to the SUV’s electrical system. By referring to the diagram, you can identify the correct fuses and their functions, allowing you to address specific electrical problems with ease.
Accessing the fuse box diagram can be done through online resources, the vehicle owner’s manual, or by visiting a dealership or repair shop. Once you have the diagram, decoding its contents, including the fuse box layout, legends, and ratings, will provide valuable insights into the electrical systems of your Expedition.
When faced with blown fuses or electrical malfunctions, the fuse box diagram becomes a valuable tool for troubleshooting. By following the above diagrams and charts, you can replace blown fuses accurately, restoring functionality to the affected components. For more complex electrical issues, it is advisable to seek professional assistance from experienced technicians.
