Ford F-250 / F-350 / F-450 / F-550 Super Duty Fuse Box: What Each Fuse Does
From the 2020 Ford F-250 / F-350 / F-450 / F-550 Super Duty owner's manual. 1 fuse box listed.
Passenger Compartment Fuse Panel
Location: Right-hand side of the passenger footwell behind a trim panel
| Fuse | Amps | Circuit |
|---|---|---|
| 1 | – | Not used. |
| 2 | 10 A | Driver door pack switch. |
| 3 | 7.5 A | Power sliding rear window switch. Seat memory switch. |
| 4 | – | Power lumbar motor. Wireless charging module. Not used. |
| 5 | – | Not used. |
| 6 | 10 A | Power telescoping mirrors switch. |
| 7 | 10 A | Front power windows switch. Brake on-off switch. |
| 8 | 5 A | Embedded modem. |
| 9 | 5 A | Combined sensor module. |
| 10 | – | Not used. |
| 11 | – | Not used. |
| 14 | – | Not used. |
| 16 | – | Not used. |
| 17 | 7.5 A | Active front steering module. |
| 19 | 5 A | Head up display. |
| 22 | 5 A | Upfitter switches. |
| 23 | 30 A | Driver front door module. |
| 24 | 30 A | Moonroof. |
| 25 | – | Not used. |
| 26 | 30 A | Passenger front door module. |
| 27 | – | Not used. |
| 28 | 30 A | Amplifier. |
| 29 | 15 A | Adjustable pedals switch. |
| 30 | 5 A | Brake on-off output to trailer brake controller and customer access circuits. |
| 31 | 10 A | Remote keyless entry. |
| 32 | 20 A | Radio. |
| 33 | – | Not used. |
| 34 | 30 A | Run/start relay. |
| 35 | – | Not used. |
| 36 | 15 A | Camera module. |
| 37 | 20 A | Lane keeping system. Auto-dimming interior mirror. Rear heated seats. Heated steering wheel. |
| 38 | 30 A | Power windows. |
Listings are copied as text from the manual's fuse tables (AI-assisted; every circuit name was matched against the cited pages 2026-10-18). Fuse layouts can differ by trim and year; check the label on the fuse box cover before replacing a fuse, and always use the same amp rating.
Confirm with your own manual, dipstick or door-jamb label.
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