2018 Ford Mustang Fuse Box Diagram

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 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.   See   Changing the 12V Battery. 

Fuse or Relay Number	Fuse Rating	Protected Component
1	—	Not used.
2	—	Not used.
3	30A1	Electronic Fan 1.
4	40A1	Electronic Fan 3.
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 motor.
16	—	Not used.
17	20A2	Convertible top motor.
18	—	Not used.
19	20A3	Steering column lock relay.
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	—	Not used.
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 (except GT350).
20A3	Left-hand high-intensity discharge head-lamps (GT350 only).
34	15A3	Exhaust valves.
35	20A3	Right-hand high-intensity discharge head-lamps (GT350 only).
36	10A3	Alt sense.
37	—	Not used.
38	20A3	Vehicle power 1.
39	—	Not used.
40	20A3	Vehicle power 2.
41	15A3	Fuel injectors (except 2.3L).
42	15A3	Vehicle power 3.
43	—	Not used.
44	15A3	Vehicle power 4.
30A3	Ignition coils (GT350 only).
45	—	Not used.
46	20A2	Differential pump (Shelby).
47	—	Not used.
48	30A2	Fuel pump #2 (Shelby).
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.
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.   Air conditioning compressor relay coils.   Vehicle dynamics module.
67	—	Not used.
68	10A3	Headlamp leveling switch.
69	—	Auxiliary power point relay.
70	10A3	Heated exterior mirrors.
71	—	Not used.
72	5A3	Rain sensor module.
73	—	Not used.
74	5A3	Mass air flow sensor (except 2.3L).
75	—	Not used.
76	—	Rear window defroster relay.
77	—	Electronic cooling fan 2 relay.
78	—	Run/Start relay.
79	—	Not used.
80	—	Windshield wiper relay.
81	—	Starter motor solenoid relay.
82	—	Powertrain control module relay.
83	—	Not used.
84	—	Not used.
85	—	Not used.
86	—	Not used.
87	—	Not used.
88	—	Not used.
89	—	Electronic fan 1 relay.
90	—	Differential pump relay.
91	—	Electronic fan 3 relay.
92	—	Blower motor relay.
93	—	Fuel pump #2 relay.
94	—	Fuel pump relay.

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

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.

Fuse or Relay Number	Fuse Rating	Protected Component
1	—	Not used.
2	7.5A	Power mirror memory module (driver side mirror).   Memory seat module.
3	20A	Driver console unlock.
4	—	Not used.
5	20A	Subwoofer amplifier.
6	—	Not used.
7	—	Not used.
8	—	Not used.
9	—	Not used.
10	5A	Telematics.
11	—	Not used.
12	7.5A	Climate control module.
13	7.5A	Gateway module.   Steering column control module.   Instrument cluster.
14	10A	Electronic power module.
15	10A	Gateway module.
16	15A	Decklid release.
17	5A	Battery backed sounder.
18	5A	Intrusion sensor module.
19	7.5A	Electronic power module.
20	7.5A	Headlamp control module.
21	5A	In-vehicle temperature and humidity sensor.   Front camera.
22	5A	Not used (spare).
23	10A	Switches.   Power windows.   Rear-view mirror.
24	20A	Central lock/unlock.
25	30A	Vehicle dynamics module.
26	30A	Right-hand front-window motor (power distribution module).
27	30A	Amplifier.
28	20A	Auxiliary body module.
29	30A	Left-hand rear-window power.
30	30A	Right-hand rear-window power.
31	—	Not used.
32	10A	Remote keyless entry.   Multi-function display.   SYNC.   Global positioning system module.   Gauges.
33	20A	Audio head unit.
34	30A	Run-start bus.
35	5A	Not used (spare).
36	15A	Auxiliary body module.
37	20A	Heated steering wheel module.

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

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

To download the complete user manual, please download the following file:

https://www.fordservicecontent.com/Ford_Content/vdirsnet/OwnerManual/Home/Index?Variantid=4691&languageCode=EN&countryCode=USA&marketCode=US&bookcode=O38071&VIN=&userMarket=usa&div=f