2021 FORD E-350 Fuses and Fuse Box User Guide
This Guide covers the 2021 Ford E-350 fuses and fuse box, including their locations, functions, and how to quickly fix common electrical faults. Get a detailed overview.
Video: 2021 FORD E-350 Fuses
FUSE SPECIFICATION CHART
Engine Compartment Fuse Box
WARNING: Always disconnect the battery before servicing high current fuses.
WARNING: To reduce risk of electrical shock, always replace the cover to the power distribution box before reconnecting the battery or refilling fluid reservoirs.
Note: If your vehicle has dual batteries, disconnecting the primary under hood battery does not remove power from all circuits.
The engine compartment fuse box is in the engine compartment. It has high-current fuses that protect your vehicle’s main electrical systems from overloads. If you disconnect and reconnect the battery, you need to reset some features.
Replace fuses with the same type and rating.
| Fuse Number | Fuse Rating | Protected Component |
| 1 | 20 A | Horn. |
| 2 | 50 A | Blower motor. |
| 3 | — | Not used. |
| 4 | 30 A | Starter relay. |
| 5 | 20 A | Not used (spare). |
| 6 | 20 A | Upfitter relay 4 (cutaway).Not used (spare) (stripped chassis). |
| 8 | — | Not used. |
| 10 | — | Not used. |
| 12 | 20 A | Power point 4. |
| 13 | 10 A | Yaw sensor (stripped chassis). Not used (spare) (cutaway). |
| 14 | 10 A | Forward looking radar (cutaway). Not used (spare) (stripped chassis). |
| 15 | — | Not used. |
| 16 | — | Not used. |
| 17 | 10 A | Powertrain control module run/start feed. |
| 18 | 10 A | Anti-lock brake system run/start feed. |
| 19 | — | Not used. |
| 20 | 30 A | Wiper power. |
| 21 | — | Not used. |
| 22 | 10 A | Wiper module (stripped chassis). Not used (spare) (cutaway). |
| 23 | — | Not used. |
| 24 | 40 A | Body control module – run power in feed 2. |
| 25 | 50 A | Body control module – run power in feed 1. |
| 26 | — | Not used. |
| Fuse Number | Fuse Rating | Protected Component |
| 27 | 20 A | Body builder frame connector. |
| 28 | — | Not used. |
| 29 | 10 A | B+ power 12 V(special order vehicle). |
| 30 | 30 A | Power driver seat (cutaway).Not used (spare) (stripped chassis). |
| 31 | — | Not used. |
| 32 | 20 A | Vehicle power 1. |
| 33 | 20 A | Vehicle power 2. |
| 34 | 10 A | Vehicle power 3. |
| 35 | 20 A | Vehicle power 4. |
| 36 | — | Not used. |
| 37 | — | Not used. |
| 38 | 10 A | Washer relay (stripped chassis). Not used (spare) (cutaway). |
| 39 | — | Not used. |
| 41 | 30 A | Trailer brake control connector. |
| 43 | 30 A | Instrument panel connector (stripped chassis). Not used (spare) (cutaway). |
| 45 | — | Not used. |
| 46 | 10 A | A/C clutch. |
| 47 | 40 A | Upfitter relay 1 (cutaway).Not used (spare) (stripped chassis). |
| 48 | — | Not used. |
| 49 | 30 A | Pump electronics module. |
| 50 | 15 A | Injectors. |
| 51 | 20 A | Power point 1. |
| 52 | 50 A | B-pillar vehicle connector (cutaway). Not used (spare) (stripped chassis). |
| Fuse Number | Fuse Rating | Protected Component |
| 53 | 30 A | Trailer tow park lamps. |
| 54 | 40 A | Upfitter 2 relay (cutaway).Not used (spare) (stripped chassis). |
| 55 | 20 A | Upfitter 3 relay (cutaway).Not used (spare) (stripped chassis). |
| 56 | 20 A | Power point 2 prep B-pillar connector. |
| 58 | 5 A | USB smart charger. |
| 59 | 10 A | Park lamps 1 (special order vehicle). |
| 60 | — | Not used. |
| 61 | — | Not used. |
| 62 | — | Not used. |
| 63 | — | Not used. |
| 64 | — | Not used. |
| 65 | — | Not used. |
| 66 | — | Not used. |
| 67 | — | Not used. |
| 69 | — | Not used. |
| 70 | 40 A | Inverter. |
| 71 | 30 A | Anti-lock brake system valves. |
| 72 | 10 A | Brake on and off switch. |
| 73 | — | Not used. |
| 74 | — | Not used. |
| 75 | — | Not used. |
| 76 | 60 A | Anti-lock brake system pump. |
| 77 | 30 A | Voltage quality module power – body control module. |
| 78 | 10 A | Trailer tow stop lamps. |
| 79 | — | Not used. |
| Fuse Number | Fuse Rating | Protected Component |
| 80 | 10 A | Trailer tow backup lamps. |
| 81 | — | Not used. |
| 82 | 5 A | Run/start fuse – upfitter relays (cutaway). B+ fuse – upfitter relay. |
| 83 | — | Not used. |
| 84 | — | Not used. |
| 85 | — | Not used. |
| 86 | — | Not used. |
| 87 | — | Not used. |
| 88 | — | Not used. |
| 89 | — | Not used. |
| 91 | 40 A | B-pillar (cutaway).Instrument panel (stripped chassis). |
| 93 | 10 A | Park lamps 3 (special order vehicle). |
| 94 | 10 A | Park lamps 2 (special order vehicle). |
| 95 | 20 A | Stop lamp relay. |
| 96 | — | Not used. |
| 97 | 50 A | Engine.B-pillar vehicle connector. Instrument panel. |
| 98 | 30 A | Trailer tow battery charge. |
| 99 | 40 A | Instrument panel connector. |
| 100 | — | Not used. |
| 101 | — | Not used. |
| 102 | — | Not used. |
| 103 | — | Not used. |
| Fuse Number | Fuse Rating | Protected Component |
| 104 | — | Not used. |
| 105 | 15 A | Trailer tow right-hand and left-hand stop and direction indicator relay power. |
Note: Spare fuse amperage may vary.
| Relay Number | Fuse Rating | Protected Component |
| R02 | — | Powertrain control module.Power relay. |
| R05 | — | Not used. |
Passenger Compartment Fuse Box
WARNING: Always disconnect the battery before servicing high current fuses.
Note: If your vehicle has dual batteries, disconnecting the primary under hood battery does not remove power from all circuits.
The fuse panel is to the left-hand side of the brake pedal and mounted onto the lower left-hand cowl panel. Remove the fuse panel cover to access the fuses.
To remove a fuse, use the fuse puller tool provided on the inside of the fuse panel cover.
Replace fuses with the same type and rating.
| Fuse Number | Fuse Rating | Protected Component |
| 1 | — | Not used. |
| 2 | 10 A | Left-hand front and right-hand front door lock switch (cutaway). Inverter (cutaway).Connector (stripped chassis). |
| 3 | 7.5 A | Power mirror switch (cutaway). |
| — | Not used (stripped chassis). | |
| 4 | 20 A | Trailer brake control. |
| 5 | 20 A | Not used (spare). |
| 6 | 10 A | Not used (spare). |
| 7 | 10 A | Not used (spare). |
| 8 | 10 A | Not used (spare). |
| 9 | 10 A | Not used (spare). |
| 10 | — | Not used. |
| 11 | — | Not used. |
| 12 | 7.5 A | Smart datalink connector. |
| Fuse Number | Fuse Rating | Protected Component |
| Enterprise wired-in-device. | ||
| 13 | 7.5 A | Cluster.Steering column control module. |
| 14 | 15 A | Not used (spare). |
| 15 | 15 A | Not used (spare). |
| 16 | — | Not used. |
| 17 | 7.5 A | Not used. |
| 18 | 7.5 A | Climate mode switch. |
| 19 | 5 A | Radio transceiver module. |
| 20 | 5 A | Ignition switch. |
| 21 | 5 A | Not used. |
| 22 | 5 A | Body builder B-pillar connector (cutaway). |
| 5 A | Not used (stripped chassis). | |
| 23 | 30 A | Not used (spare). |
| 24 | 30 A | Not used (spare). |
| 25 | 20 A | Not used (spare). |
| 26 | 30 A | Not used (spare). |
| 27 | 30 A | Not used (spare). |
| 28 | 30 A | Not used (spare). |
| 29 | 15 A | Upfitter interface module (cutaway). |
| — | Not used (stripped chassis). | |
| 30 | 5 A | Not used (spare). |
| 31 | 10 A | Smart datalink connector. |
| 32 | 20 A | Radio. |
| 33 | — | Not used. |
| 34 | 30 A | Not used (spare). |
| 35 | 5 A | Tow haul switch. |
| Fuse Number | Fuse Rating | Protected Component |
| 36 | 15 A | Rear view mirror (cutaway). Rear view camera (cutaway). |
| — | Not used (stripped chassis). | |
| 37 | 20 A | Not used (spare). |
| 38 | 30 A | Rear window switches and motors (cutaway). |
| — | Not used (stripped chassis). |
Note: Spare fuse amperage may vary.
CHANGING A FUSE
Fuses
WARNING: 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.
If electrical components in the vehicle are not working, a fuse may have blown. Blown fuses are identified by a broken wire within the fuse. Check the appropriate fuses before replacing any electrical components.
Fuse Types
- A Micro 2.
- B Micro 3.
- C Maxi.
- D Mini.
- E M Case.
- F J Case.
- G J Case Low Profile.
- H Slotted M Case.
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