Ford Super Duty – Changing a fuse

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Ford Super Duty – Changing a fuse

See also: Ford Trucks Service Repair Manuals PDF

Ford Super Duty - changing fuse

Ford Super Duty


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.

Standard Fuse Amperage Rating and Color

Fuse rating Mini fuses Standard fuses Maxi fuses Cartridge maxi fuses Fuse link cartridge
2A Grey Grey
3A Violet Violet
4A Pink Pink
5A Tan Tan
7.5A Brown Brown
10A Red Red
15A Blue Blue
20A Yellow Yellow Yellow Blue Blue
25A Natural Natural Natural Natural
30A Green Green Green Pink Pink
40A Orange Green Green
50A Red Red Red
60A Blue Yellow Yellow
70A Tan Brown
80A Natural Black Black

Fuse Specification Chart

Power Distribution 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.

The power distribution box is located in the engine compartment. It has high-current fuses that protect your vehicle’s main electrical systems from overloads.

Power Distribution Box

Power Distribution Box

The high-current fuses are coded as follows:

Fuse or relay location Fuse amp rating Protected circuits
1 Relay Blower motor
2 Not used
3 Relay Urea heaters (diesel engine)
4 Not used
5 Relay Rear window defroster, Heated mirrors
6 Not used
Fuse or relay location Fuse amp rating Protected circuits
7 50A* Rear window defroster, Heated mirrors
8 30A* Passenger seat
9 30A* Driver seat
10 Not used
11 Not used
12 30A* Smart window motor
13 Not used
14 Not used
15 Diode Fuel pump (diesel engine)
16 Not used
17 15A** Heated mirror
18 Not used
19 Not used
20 Not used
21 Not used
22 30A* Trailer tow electric brake
23 40A* Blower motor
24 Not used
25 30A* Wipers
26 30A* Trailer tow park lamps
27 25A* Urea heaters (diesel engine)
28 Buss bar
29 Relay Trailer tow park lamps
30 Relay A/C clutch
31 Relay Wipers
32 Not used
33 15A** Vehicle power 1
34 15A** Vehicle power 2 (diesel engine)
20A** Vehicle power 2 (gas engine)
35 10A** Vehicle power 3
Fuse or relay location Fuse amp rating Protected circuits
36 15A** Vehicle power 4 (diesel engine)
20A** Vehicle power 4 (gas engine)
37 10A** Vehicle power 5 (diesel engine)
38 Relay Powertrain control module (diesel engine), Electronic control module (gas engine)
39 10A** 4×4 hub lock
40 15A** 4×4 electronic lock
41 Not used
42 20A** Rear heated seats
43 Not used
44 Not used
45 10A** Run/start relay coil
46 10A** Transmission control module keep-alive power (diesel engine)
47 10A** A/C clutch feed
48 Relay Run/start
49 10A** Rearview camera system
50 10A** Blower motor relay coil
51 Not used
52 10A** Powertrain control module / Electronic control module / Transmission control module run/start
53 10A** 4×4 module
54 10A** Anti-lock brake system run/start
55 10A** Rear window defroster coil, Battery charge coil
56 20A** Passenger compartment fuse panel run/start feed
57 Relay Fuel pump
58 Not used
Fuse or relay location Fuse amp rating Protected circuits
59 Not used
60 Not used
61 Not used
62 Not used
63 Not used
64 Not used
65 Not used
66 20A** Fuel pump
67 Not used
68 10A** Fuel pump relay coil
69 Not used
70 10A** Trailer tow backup lamp
71 10A** Canister vent (gas engine)
72 10A** Powertrain control module / Electronic control module relay coil feed keep-alive power
73 Not used
74 Relay Trailer tow left-hand stop/turn
75 Relay Trailer tow right-hand stop/turn
76 Relay Backup lamp
77 Not used
78 Not used
79 Not used
80 Not used
81 Not used
82 20A* Auxiliary power point #2
83 20A* Auxiliary power point #1
84 30A* 4×4 shift motor
85 30A* Heated/cooled seats
86 25A* Anti-lock brake system coil feed
87 20A* Auxiliary power point #5
Fuse or relay location Fuse amp rating Protected circuits
88 20A* Auxiliary power point #6
89 40A* Starter motor
90 25A* Trailer tow battery charge
91 Not used
92 20A* Auxiliary power point #4
93 20A* Auxiliary power point #3
94 25A* Upfitter #1
95 25A* Upfitter #2
96 50A* Anti-lock brake system pump
97 40A* Inverter
98 Not used
99 40A* Instrument panel power inverter
100 25A* Trailer tow turn signals
101 Relay Starter
102 Relay Trailer tow battery charge
103 Not used
104 Not used
105 Not used
106 Not used
107 Not used
* Cartridge fuses ** Mini fuses

Passenger Compartment Fuse Panel

Passenger Compartment Fuse Panel

Passenger Compartment Fuse Panel

The fuse panel is located in the passenger’s footwell. Remove the panel cover to access the fuses.

To remove the fuse panel cover, pull the panel toward you. When the clips of the panel disengage, let the panel fall easily.

To remove a fuse, use the fuse puller tool provided on the fuse panel cover.

Ford Super Duty Fuse box

Fuse box

The fuses are coded as follows.

Fuse or relay location Fuse amp rating Protected circuits
1 30A Not used (spare)
2 15A Upfitter relay #4
Fuse or relay location Fuse amp rating Protected circuits
3 30A Smart window motor
4 10A Interior lights, Hood lamp
5 20A Moonroof
6 5A Driver seat module
7 7.5A Driver seat switch, Driver lumbar motor
8 10A Power mirror switch
9 10A Upfitter relay #3
10 10A Run/accessory relay, Customer access feed
11 10A Instrument cluster
12 15A Interior lighting, Lighted running board lamps
13 15A Right turn signals and brake lamps, Right trailer tow stop turn relay
14 15A Left turn signals and brake lamps,

Left trailer tow stop turn relay

15 15A High-mounted stop lamps, Backup lamps, Trailer tow backup relay, Reverse signal interior mirror
16 10A Right low beam headlamp
17 10A Left low beam headlamp
18 10A Keypad illumination, Passive anti-theft indicator, Powertrain control module, Brake shift interlock
19 20A Subwoofer, Amplifier
20 20A Power door locks
21 10A Brake on/off switch
22 20A Horn
23 15A Not used (spare)
Fuse or relay location Fuse amp rating Protected circuits
24 15A Steering wheel control module, Diagnostic connector, Power fold mirror relay, Remote keyless entry, Electronic finish panel
25 15A Not used (spare)
26 5A Steering wheel control module
27 20A Not used (spare)
28 15A Ignition switch
29 20A SYNC, GPS module, Radio faceplate
30 15A Parking lamp relay, Trailer tow parking lamp relay
31 5A Trailer brake controller (brake

signal), Customer access

32 15A Moonroof motor, Telescoping mirror switch, Auto dimming mirrors, Power inverter, Driver and passenger door lock switch illumination, Rear heated seat switch illumination
33 10A Restraint control module
34 10A Heated steering wheel module, Rear heated seats module
35 5A Select shift switch, Reverse park aid module, Trailer brake control module
36 10A Fuel tank select switch
37 10A PTC heater
38 10A AM/FM radio faceplate
39 15A High beam headlamps
40 10A Parking lamps (in mirrors), Roof marker lamps
Fuse or relay location Fuse amp rating Protected circuits
41 7.5A Passenger airbag deactivation indicator
42 5A Not used (spare)
43 10A Wiper relay
44 10A Upfitter switches
45 5A Not used (spare)
46 10A Climate control
47 15A Fog lamps, Fog lamp indicator (in switch)
48 30A Circuit Breaker Power windows switch, Power rear sliding window switch
49 Relay Delayed accessory


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