2021 Ford Mustang Fuse Box Diagram

Power Distribution Box

WARNING   WARNING:  Always disconnect the battery before servicing high current fuses.
WARNING   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 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.  

2021 Ford Mustang Engine Fuse Box Diagram
Fuse or Relay Number  Fuse Rating  Protected Component  
1  60A1  Electronic fan 1 (GT500).  
—  Not used (base).  
2  —  Not used.  
3  30A1  Electronic fan 1 (base).  
—  Not used (GT500).  
4  40A1  Electronic fan 3 (base).  
—  Not used (GT500).  
5  50A1  Automatic brake system pump.  
6  50A1  Body control module.  
7  60A1  Body control module.  
8  50A1  Body control module.  
9  40A1  Rear window defroster.  
10  40A1  Blower motor.  
11  30A2  Left-hand front window.  
12  30A2  Driver seat.  
13  30A2  Passenger seat.  
14  30A2  Climate controlled seat module.  
15  20A2  Convertible top slave motor (base).  
—  Not used (GT500).  
16  15A2  Charge air cooler pump (GT500).  
—  Not used (base).  
17  20A2  Convertible top master motor (base).  
—  Not used (GT500).  
18  —  Not used.  
19  20A3  Steering column lock relay (base).  
10A3  Transmission control unit (GT500).  
20  10A3  Brake on-off switch.  
21  20A3  Horn.  
22  10A3  Powertrain control module relay.  
23  10A3  Air conditioning clutch.  
24  30A2  Voltage quality module.  
25  20A2  Steering column lock relay (GT500).  
—  Not used (base).  
26  25A2  Windshield wiper motor.  
27  —  Not used.  
28  30A2  Automatic brake system valve.  
29  —  Not used.  
30  30A2  Starter motor solenoid.  
31  —  Not used.  
32  10A3  Latch relay coil.  
33  15A3  Run/start (base).  
20A3  Left-hand high-intensity discharge headlamps (GT500).  
34  15A3  Exhaust valves.  
35  20A3  Right-hand high-intensity discharge headlamps (GT500).  
—  Not used (base).  
36  10A3  Alternator sense.  
37  —  Not used.  
38  20A3  Vehicle power 1.  
39  —  Not used.  
40  20A3  Vehicle power 2.  
41  15A3  Fuel injectors.  
42  15A3  Vehicle power 3.  
43  —  Not used.  
44  15A3  Vehicle power 4 (base).  
30A3  Vehicle power 4 (GT500).  
45  —  Not used.  
46  20A2  Differential pump (Mach 1, GT500).  
—  Not used (base).  
47  —  Not used.  
48  30A2  Fuel pump #2 (GT500).  
—  Not used (base).  
49  30A2  Fuel pump.  
50  —  Steering column lock relay.  
51  —  Not used.  
52  —  Horn relay.  
53  20A2  Cigar lighter.  
54  20A2  Auxiliary power point.  
55  25A2  Electronic fan 2 (base).  
—  Not used (GT500).  
56  —  Not used.  
57  —  Air conditioning clutch relay.  
58  —  Not used.  
59  —  Exhaust valves relay.  
60  5A3  Powertrain control module.  
61  —  Not used.  
62  5A3  Anti-lock brakes run/start switch.  
63  —  Not used.  
64  5A3  Electronic power assist steering.  
65  —  Not used.  
66  5A3  Blind spot information system.   Rear view camera.   Rear window defroster relay coils.   Vehicle dynamics module.  
67  —  Not used.  
68  10A3  Headlamp leveling switch (base).  
10A3  Signature lighting (GT500).  
69  —  Cigar lighter relay.   Auxiliary power point relay.  
74  5A3  Mass air flow sensor (base).  
—  Not used (GT500).  
75  5A3  Rain sensor module (base).  
—  Not used (GT500).  
76  —  Rear window defroster relay.  
77  —  Electronic cooling fan 2 relay (base).  
—  Not used (GT500).  
78  —  Run/start relay (base).  
—  Not used (GT500).  
79  —  Charge air cooler pump relay (GT500).  
—  Not used (base).  
80  —  Windshield wiper relay.  
81  —  Starter motor solenoid relay.  
82  —  Powertrain control module relay.  
83  —  Cooling fan relay (GT500).  
—  Not used (base).  
87  10A3  Heated exterior mirrors.  
88  —  Not used.  
89  —  Electronic fan 1 relay (base).  
—  Not used (GT500).  
90  —  Differential pump relay (Mach 1, GT500).  
—  Not used (base).  
91  —  Electronic fan 3 relay (base).  
—  Not used (GT500).  
92  —  Blower motor relay.  
93  —  Fuel pump #2 relay (GT500).  
—  Not used (base).  
94  —  Fuel pump relay.  

1J-case fuses.2M-case fuses.3Micro fuses.

Note:   Spare fuse amperage may vary.

Passenger Compartment Fuse Panel

The fuse panel is in the right-hand side of the passenger footwell behind a trim panel and plastic key code card.To remove the trim panel, lift it from the rear retaining hooks, while pulling it toward you and swinging it away from the side. To reinstall it, line up the tabs with the grooves on the panel, drop the panel back into place, and then push it shut.To reach the fuse panel, first remove the key code card. After replacing a fuse, return the key code card to the original position. To reinstall the trim panel, lineup the tabs with the grooves on the panel, drop the panel back into place, and then push it shut to reinstall the trim panel.

2021 Ford Mustang Passenger Fuse Box Diagram
Fuse or Relay Number  Fuse Rating  Protected Component  
1  —  Not used.  
2  10A  Power windows.   Electrochromic mirror.   Power door locks.  
3  7.5A  Power mirrors (base).   Memory seats (base).  
—  Not used (GT500).  
4  20A  Not used (spare).  
5  —  Not used.  
6  10A  Not used (spare).  
7  10A  Not used (spare).  
8  5A  Telematic control unit – modem.  
9  5A  Not used.  
10  —  Not used.  
11  —  Not used.  
12  7.5A  Electronic control panel.   Gateway module.   Gear shift module (GT500).  
13  7.5A  Steering column control module.   Instrument cluster.  
14  15A  Not used.  
15  15A  SYNC.   Gauges.  
16  —  Not used.  
17  7.5A  Headlamp leveling switch (base).  
—  Not used (GT500).  
18  7.5A  Not used.  
19  5A  Not used.  
20  5A  Intrusion sensor module.  
21  5A  In-vehicle temperature and humidity sensor.  
22  5A  Auxiliary body module.  
23  30A  Amplifier.  
24  30A  Vehicle dynamics module.  
25  20A  Ambient lighting module (base).   Auxiliary body module.  
26  30A  Right-hand front-window motor (power distribution module).   Passenger door control unit.  
27  30A  Left-hand rear-window power (base).  
—  Not used (GT500).  
28  30A  Right-hand rear-window power (base).  
—  Not used (GT500).  
29  15A  Gateway module (base).   Not used (spare) (GT500).  
30  5A  Not used (spare)  
31  10A  Remote keyless entry.  
32  20A  Audio unit.  
33  —  Not used.  
34  30A  Run/start bus.  
35  5A  Power distribution box run/start relay (base).  
—  Not used (GT500).  
36  15A  Front camera (base).  
—  Not used (GT500).  
37  20A  Heated steering wheel module (base).  
—  Not used (GT500).  

Note:   Spare fuse amperage may vary.

2021 Ford Mustang Owners Manual

Changing a Fuse

Fuses

WARNING   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.

Missing ImageIf 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 TypesMissing Image

Callout  Fuse Type  
A  Micro 2  
B  Micro 3  
C  Maxi  
D  Mini  
E  M Case  
F  J Case  
G  J Case Low Profile  

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