2021 Ford Expedition Fuse Box Diagram. Know the Function Code

Discovering the 2021 Ford Expedition fuse box diagram is essential for troubleshooting electrical problems and maintaining optimal performance. In this concise guide, we will provide you with the necessary information on fuse locations, their functions, and changing guidelines. Equip yourself with this knowledge to navigate the fuse box with confidence and keep your SUV running smoothly.

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.

A fuse box diagram is necessary because it acts as a visual guide that illustrates the various fuses and their corresponding circuits in a vehicle. It helps identify the fuse responsible for a specific electrical system or component. It allows vehicle owners or technicians to quickly locate and address electrical problems, ensuring the proper functioning of the vehicle’s electrical systems. Here are important guidelines before servicing high-current fuses.

  • Always disconnect the battery before working with high-current fuses.
  • To reduce the risk of electrical shock, always replace the cover with the power distribution box before reconnecting the battery or refilling fluid reservoirs.
  • Always replace a fuse with one that has the specified amperage rating. Using a fuse with a higher amperage rating can cause severe wire damage and could start a fire.

2021 Ford Expedition Fuse Box Diagram (Engine Compartment)

The Under Hood Fuse Box of the 2021 Ford Expedition is located in the engine compartment. You need to open the hood to access the fuse box and its components. The power distribution box, which houses high-current fuses these fuses plays a vital role in safeguarding the main electrical. The high-current fuses within the power distribution box are coded using a specific system this coding scheme helps identify and differentiate the various fuses. The high-current fuses are coded as follows:

2021 FORD EXPEDITION FUSE BOX DIAGRAM
Fuse Number  Fuse Rating  Protected Component  
1  25 AHorn.  
2  50 AElectric fan 1.  
3  30 AFront wiper motor.  
4  50 AInverter.  
5  30 AStarter relay.  
6  20 APower point #1.  
8  20 APower point #2.  
10  5 ARain sensor.  
12  20 ATrailer tow light module.  
13  10 A4×4 module.   Heated backlight relay coil.   Heated mirror relay coil.   Heated wiper park relay coil.   Transmission isolation relay coil.  
14  15 ANot used (spare).  
15  15 AVoltage quality module run/start power.   Blindspot information system.   Image processing module B.   Front view camera.   Rearview camera.   Cruise control module.  
16  10 APowertrain control module run/start feed.  
17  10 AAnti-lock brake system run/start feed.  
18  10 AElectronic power assist steering run/start feed.  
19  —  Not used.  
20  40 AFront blower.  
21  40 APassenger seat motors.  
22  —  Not used.  
23  10 AAlternator A-line.  
24  30 ATrailer brake control module.  
25  50 ABody control module power 1.  
26  50 AElectric fan 3.  
27  40 ADriver seat motors.  
28  15 ARear heated seats.   Rear seat climate control module.  
29  —  Not used.  
30  25 ATrailer tow class II-IV battery charge.  
31  50 APower folding seat module.  
32  10 AA/C clutch.  
33  —  Not used.  
34  —  Not used.  
35  20 AVehicle power 4.  
36  10 AVehicle power 3.  
37  25 AVehicle power 2.  
38  25 AVehicle power 1.  
39  —  Not used.  
41  —  Not used.  
43  —  Not used.  
45  20 AFront and rear washer pump.  
46  7.5 AFamily entertainment system.  
47  —  Not used.  
48  —  Not used.  
49  —  Not used.  
50  30 AFuel pump.  
51  20 APower point #3.  
52  50 ABody control module voltage quality module.  
53  25 ATrailer tow park lamps relay.   Trailer tow control module.  
54  40 AElectronic limited-slip differential relay.  
55  40 AAuxiliary blower.  
56  20 APower point #4.  
58  5 ANot used (spare).  
59  —  Not used.  
60  5 ANot used (spare).  
61  25 ANot used (spare).  
62  25 ANot used (spare).  
63  25 A4×4 module.  
64  —  Not used.  
65  —  Not used.  
66  —  Not used.  
67  —  Not used.  
69  30 APower liftgate module.  
70  40 AAnti-lock brake system and parking brake module.  
71  25 A4×4 module.  
72  —  Not used.  
73  —  Not used.  
74  10 ATrailer tow backup lamps.  
75  —  Not used.  
76  50 ABody control module power 2.  
77  30 AClimate control seat module.  
78  —  Not used.  
79  —  Not used.  
80  10 AHeated wiper park.  
81  —  Not used.  
82  —  Not used.  
83  15 ANot used (spare).  
84  —  Not used.  
85  —  Not used.  
86  5 AUSB smart charger #5.  
87  5 AUSB smart charger #3.  
88  10 AMulti-contour seats relay.  
89  40 APower running boards.  
91  —  Not used.  
93  15 AHeated mirrors.  
94  5 AUSB smart charger #1.  
95  10 AUSB smart charger #2.  
96  30 ARear wiper motor relay.  
97  40 ANot used (spare).  
98  15 ATransmission oil pump.  
99  40 AHeated backlight.  
100  20 APower point #5.  
101  25 AElectric fan 2.  
102  —  Not used.  
103  —  Not used.  
104  —  Not used.  
105  —  Not used.  
Relay Number  Protected Component  
R02  Powertrain control module.  
R05  Electric fan 2.  

2021 Ford Expedition Fuse Box Diagram (Passenger Compartment)

The fuse panel in your vehicle is conveniently located on the right-hand side of the passenger footwell, concealed behind a trim panel. This accessibility allows you to inspect and replace fuses as required, ensuring the smooth operation of your vehicle’s electrical systems.

First, find the fuse panel cover and take note of the tabs located on both sides of the cover. Simultaneously press and hold down the tabs to release them from their locked position. While maintaining pressure on the tabs, gently pull the cover away, making sure not to exert too much force.

To reinstall the fuse panel cover after performing any necessary checks or replacements, start by placing the top part of the cover onto the fuse panel, making sure it is aligned properly. Apply firm pressure to the bottom part of the cover to ensure it securely latches into place. To verify that the cover has been installed correctly, gently tug on it to ensure it is securely latched and will not come loose during operation.

2021 FORD EXPEDITION FUSE BOX DIAGRAM
Fuse Number  Fuse Rating  Protected Component  
1  —  Not used.  
2  10 ADriver seat switch.  
3  7.5 ADriver door unlock.  
4  20 ASpeaker amplifier.  
5  —  Not used.  
6  10 ASmart datalink connector logic.  
7  10 ARear audio control module.  
8  5 AWireless accessory charger.   Hands-free liftgate module.  
9  5 AKeypad.   Combined sensor module.  
10  —  Not used.  
11  —  Not used.  
12  7.5 AInstrument cluster.  
13  7.5 ASteering column control module.   Smart datalink connector logic.   Climate control module.   Gear shift module.  
14  15 ABrake switch.  
15  15 ASYNC.  
16  —  Not used.  
17  —  Not used.  
18  7.5 AGear shift module.   Column shifter.  
19  5 ATelematics control unit module.  
20  5 AIgnition switch.  
21  5 AIn-vehicle temperature and humidity sensor.  
22  5 AElectrochromic mirror.   Second row heated seat module.  
23  30 APower window switch.   Power mirror switch.   Left-hand front door zone module.  
24  30 AMoonroof logic.  
25  20 ASpeaker amplifier 2.  
26  30 ARight-hand front door zone module.  
27  30 ALeft-hand rear door zone module.  
28  30 ARight-hand rear door zone module.  
29  15 AAdjustable pedals.  
30  5 ATrailer tow control module.  
31  10 ARear climate control module.   Drive mode switch module.   Terrain management switch.   Radio frequency transceiver module.   4×4 switch.  
32  20 AAudio control module.  
33  —  Not used.  
34  30 ARun/start relay.  
35  5 ANot used (spare).  
36  15 AImage processing module A.   Automated park assist module.   Continuous control damping module.  
37  20 AHeated steering wheel.  
38  30A Circuit Breaker  Left-hand rear power window.   Right-hand rear power window.  
Explore more:
2023 Ford Expedition Fuse Box Diagram.
2022 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.
2003 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, having a clear understanding of the fuse box diagram in your 2021 Ford Expedition is essential for maintaining and troubleshooting electrical issues in your vehicle. With the information provided in this blog post, you should now be equipped with the knowledge to locate and identify the fuses and relays in your truck. Don’t hesitate to consult a professional if you encounter complex electrical issues beyond your expertise. Remember to refer to your vehicle’s owner’s manual for the most accurate and up-to-date information specific to your model and trim level. The fuse box diagram may vary slightly depending on the configuration.

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