Ford F-550 2018 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is in the right-hand side of the passenger footwell behind a trim panel.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | - | Not used |
| 2 | 7.5A | Memory seat switch (lumbar power) |
| 3 | 20A | Driver door unlock relay |
| 4 | 5A | Aftermarket electronic brake controller, Trailer brake controller Brake On/Off, Customer access circuits |
| 5 | - | Not used |
| 6 | - | Not used |
| 7 | - | Not used |
| 8 | 10A | Driver window switch mirror fold |
| 9 | 10A | Brake On/Off / Pressure Switch |
| 10 | - | Not used |
| 11 | 5A | Combined sense security module |
| 12 | 7.5A | Front climate control module |
| 13 | 7.5A | Instrument cluster, Smart data link, Steering column control module |
| 14 | 10A | Extended power restraints module |
| 15 | 10A | Smart datalink connector power |
| 16 | 15A | Tailgate release solenoid |
| 17 | 5A | Head-up display |
| 18 | 5A | Push button ignition switch, Ignition switch, Key inhibit |
| 19 | 7.5A | Transmission control switch (tow/haul), Select Shift switch |
| 20 | 7.5A | Active front steering module |
| 21 | 5A | Head-up display, Humidity sensor |
| 22 | 5A | Upfitter switch, Run/Start, PTO relays |
| 23 | 10A | Accessory delay, Power windows, Moonroof, Power folding mirrors relay, Inverter, Window/moonroof switch illumination |
| 24 | 20A | Central locking system relay |
| 25 | 30A | Left-hand front smart window motor, Door zone module |
| 26 | 30A | Right-hand front smart window motor, Door zone module |
| 27 | 30A | Moonroof |
| 28 | 20A | Sony amplifier - 10 channel |
| 29 | - | Not used |
| 30 | - | Not used |
| 31 | 15A | Adjustable pedals switch |
| 32 | 10A | SYNC, GPS module, Display, Radio frequency receiver |
| 33 | 20A | Radio |
| 34 | 30A | Run-start relay |
| 35 | 5A | Extended power restraints module |
| 36 | 15A | Lane keeping system, Automatic high beam control, Auto-dimming mirrors, Rear heated seats, Camera module |
| 37 | 20A | Heated steering wheel |
| 38 | 30A | Rear power window switch |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 20A | Powertrain control module |
| 2 | 20A | Emissions - malfunction indicator lamp |
| 3 | 20A | Cooling fan, A/C compressor, Engine brake |
| 4 | 20A | Noise suppression cap, Mass air flow sensor, Emissions, Glow plugs, Urea |
| 5 | 15A | Compressed natural gas fuel control module, Fuel sensor |
| 6 | - | Not used |
| 7 | - | Not used |
| 8 | - | Not used |
| 9 | - | Not used |
| 10 | 15A | Heated exterior mirrors |
| 11 | - | Compressed natural gas relay |
| 12 | 40A | Heated rear window |
| 13 | - | Not used |
| 14 | - | Powertrain control module relay |
| 15 | 20A | Horn |
| 16 | 10A | A/C clutch relay power |
| 17 | - | Rear heated window and heated mirrors relay |
| 18 | - | Trailer park lamp relay |
| 19 | - | Not used |
| 20 | - | Supplemental air heater bank #1 relay |
| 21 | - | Not used |
| 22 | - | Not used |
| 23 | - | Not used |
| 24 | - | Cooling fan relay, Supplemental air heater bank #3 relay |
| 25 | - | Glow plug module power relay |
| 26 | - | Not used |
| 27 | 30A | Trailer tow battery charge relay (if equipped) |
| 28 | - | Not used |
| 29 | - | Run-start relay |
| 30 | 10A | 4x4 module |
| 31 | 5A | Adaptive cruise control, Run-start |
| 32 | 5A | Anti-lock brake system module, Run-start |
| 33 | 10A | Powertrain control module - ignition status power run, Run-start, Engine control module, Transmission control module |
| 34 | 10A | Blind spot information system, Run-start, Front camera, Rear camera |
| 35 | - | Not used |
| 36 | - | Blower motor relay |
| 37 | - | Trailer tow battery charge relay (only on non-trailer brake controller vehicles) |
| 38 | - | A/C compressor clutch relay |
| 39 | - | Horn relay |
| 40 | - | Supplemental air heater bank #2 relay |
| 41 | 25A | Glow plugs |
| 42 | 40A | Trailer tow lighting module (if equipped) |
| 43 | 40A | Front blower motor |
| 44 | 50A | Voltage quality, Body control module power |
| 45 | 60A | Active front steering |
| 46 | 50A | Supplemental air heater bank #2 |
| 47 | 50A | Cooling fan, Supplemental air heater bank #3 |
| 48 | 50A | Body control module run power 1 bus |
| 49 | 60A | Inverter |
| 50 | 50A | Body control module run power 2 bus |
| 51 | 60A | Body control module B+ feed |
| 52 | 60A | Anti-lock brake system pump |
| 53 | 50A | Supplemental air heater bank #1 |
| 54 | 30A | Trailer brake control module |
| 55 | 30A | Climate controlled seat module |
| 56 | 40A | Auxiliary lighting module |
| 57 | 30A | Power running boards |
| 58 | 30A | Compressed natural gas fuel control module relay |
| 59 | 30A | Anti-lock brake system valve |
| 60 | - | Not used |
| 61 | 30A | Driver power seat |
| 62 | 20A | Auxiliary power point #1 (instrument panel) |
| 63 | 30A | Starter motor |
| 64 | 20A | Auxiliary power point #2 |
| 65 | 30A | Trailer tow lighting module (if equipped) |
| 66 | 20A | Auxiliary power point #3 (center console) |
| 67 | 30A | Passenger power seat |
| 68 | 20A | Auxiliary power point #4 (USB charger, rear center console) |
| 69 | 25A | 4x4 module |
| 70 | 20A | Auxiliary power point #5 (rear center console) |
| 71 | - | Not used |
| 72 | 30A | Trailer tow left hand/right hand stop/turn (if equipped, not present with trailer brake controller) |
| 73 | - | Not used |
| 74 | - | Not used |
| 75 | 30A | Fuel pump |
| 76 | - | Not used |
| 77 | 30A | Wiper motor |
| 78 | - | Not used |
| 79 | 30A | Power sliding rear window |
| 80 | 25A | 4x4 module |
| 81 | 10A | 4x4 solenoid |
| 82 | 10A | Power telescoping mirrors |
| 83 | 20A | Rear heated seats |
| 84 | 10A | Trailer tow backup lamps (if equipped) |
| 85 | - | Not used |
| 86 | - | Not used |
| 87 | - | Not used |
| 88 | 10A | Multi contour seats |
| 89 | - | Not used |
| 90 | 10A | Spot light module |
| 91 | 10A | Upfitter interface module |
| 92 | - | Not used |
| 93 | - | Not used |
| 94 | 15A | Transmission control module |
| 95 | 10A | Powertrain control module keep alive power |
| 96 | 5A | Rain sensor |
| 97 | 10A | Run/Start control for Auxiliary power point #5 |
| 98 | 10A | Alternator sense |
| 99 | 30A | Trailer tow parking lamps |
