2018 Ford F-650/750 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 will need to reset some features.   See   Changing the 12V Battery. 

Fuse or Relay Number	Fuse Rating	Protected Components
1	Relay	Blower motor.
2	Relay	Trailer tow and body builder stoplamps.
3	Relay	Urea heaters (diesel engine).
4	Relay	Driver air ride seat compressor.
5	Relay	Heated mirrors.
6	—	Not used.
7	—	Not used.
8	20A1	Passenger air ride seat compressor.
9	—	Not used.
10	—	Not used.
11	—	Not used.
12	—	Not used.
13	Resistor	Terminating resistor (120 ohm).
14	—	Not used.
15	—	Not used.
16	—	Not used.
17	—	Not used.
18	—	Not used.
19	10A2	Brake on/off isolation relay.
20	—	Not used.
21	—	Not used.
22	30A1	Trailer tow electric brake controller.
23	40A1	Blower motor.
24	—	Not used.
25	30A1	Wipers.
26	30A1	Trailer tow park lamps.
27	25A1	Urea heaters (diesel engine).
29	Relay	Trailer tow park lamps.
30	Relay	A/C clutch.
31	Relay	Wipers.
32	—	Not used.
33	20A2	Vehicle power 1.
34	20A2	Vehicle power 2.
35	10A2	Vehicle power 3.
36	20A2	Vehicle power 4.
37	10A2	Vehicle power 5 (diesel engine).
38	Relay	Powertrain control module.
39	—	Not used.
40	15A2	Heated mirrors.
41	—	Not used.
42	20A2	Trailer tow and body builder stoplamps.
43	—	Not used.
44	20A2	Ancillary translator module.
45	10A2	Run/start relay coil.
46	10A2	Transmission control module keep-alive power (diesel engine).
47	10A2	A/C clutch.
48	Relay	Run/start.
49	20A2	Air dryer.
50	10A2	Blower motor relay coil.
51	—	Not used.
52	10A2	Powertrain control module run/start (diesel engine).   Transmission control module run/start (diesel engine).
53	—	Not used.
54	10A2	Anti-lock brake system run/start.
55	10A2	Seat compressor relay coil.   Chassis solenoids relay coil.   Heated mirror relay coil.
56	20A2	Passenger compartment fuse panel run/start feed.
57	Relay	Fuel pump.
58	5A2	Wiper relay.
59	5A2	Chassis solenoid relay.   Air ride seat compressor relay.
60	—	Not used.
61	—	Not used.
62	—	Not used.
63	10A2	Chassis solenoids.
64	—	Not used.
65	10A2	Cargo box lamp.
66	30A2	Fuel pump.
67	—	Not used.
68	10A2	Fuel pump relay coil.
69	—	Not used.
70	10A2	Trailer tow or body builder backup lamps.
71	—	Not used.
72	10A2	Powertrain control module relay coil.   Keep-alive power.
73	5A2	Hydromax monitor.
74	Relay	Chassis solenoids.
75	—	Not used.
76	—	Not used.
77	Relay	Brake switch isolation (hydraulic brakes).
78	—	Not used.
79	—	Not used.
80	—	Not used.
81	—	Not used.
82	20A1	Auxiliary power point #2.
83	20A1	Auxiliary power point #1.
84	20A1	Driver air ride seat compressor.
85	60A1	Hydromax pump.
86	30A1	Anti-lock brake system modulator valves.
87	—	Not used.
88	—	Not used.
89	40A1	Starter motor
90	30A1	Trailer battery feed (air brakes).   Trailer tow battery charge (hydraulic brakes).
91	Relay	Cargo box lamp.
92	—	Not used.
93	—	Not used.
94	25A1	Upfitter relay #1.
95	25A1	Upfitter relay #2.
96	60A1	Anti-lock brake system pump (hydraulic brakes).
97	—	Not used.
98	—	Not used.
99	40A1	Instrument panel 110 volt power inverter.
100	30A1	Trailer tow turn lamp relays.
101	Relay	Starter.
102	Relay	Trailer tow battery charge relay (U-Haul).   Trailer tow battery feed (air brakes).
103	Relay	Trailer tow right hand side turn and stop lamps.
104	Relay	Trailer tow left hand side turn and stop lamps.
105	—	Not used.
106	Relay	Trailer tow backup lamps relay.
107	Relay	Passenger air ride seat compressor relay.

¹J-case fuse.²Mini fuse.

Passenger Compartment Fuse Panel

The fuse panel is in the passenger footwell. Remove the panel cover to access the fuses.Pull the fuse panel cover toward you to remove it. When the clips of the panel disengage, let the panel fall easily. Use the provided fuse puller tool to remove a fuse. It is on the fuse panel cover.

Fuse or Relay Number	Fuse Rating	Protected Components
1	30A	Left front window motor.
2	15A	Upfitter relay #4.
3	30A	Right front window motor.
4	10A	Interior lamps.
5	20A	Not used (spare).
6	5A	Not used (spare).
7	7.5A	Power mirror switch.
8	10A	Not used (spare).
9	10A	Upfitter relay #3.
10	10A	Not used (spare).
11	10A	Ford telematics battery feed.
12	15A	Interior lighting.
13	15A	Right turn and brake lamps.
14	15A	Left turn and brake lamps.
15	15A	Center high-mounted stop lamp.   Backup lamps.
16	10A	Right headlamp low beam.
17	10A	Left headlamp low beam.
18	10A	Powertrain control module wakeup.   Brake shift interlock.
19	20A	Not used (spare).
20	20A	Power door locks.
21	10A	Brake on/off switch.
22	20A	Horn.
23	15A	Instrument cluster.
24	15A	Diagnostic connector.   Power fold mirror relay.   Steering wheel control module.   Remote keyless entry.
25	15A	Not used (spare).
26	5A	Steering wheel control module.
27	20A	Not used (spare).
28	15A	Ignition switch.
29	20A	Radio.   SYNC.
30	15A	Parking lamps.   Trailer tow parking lamps relay coil.
31	5A	Customer access trailer brake on/off switch.
32	15A	Delayed accessory power.   Driver and passenger door lock switch illumination.   110 volt power inverter module.   Telescoping mirror switch.
33	10A	Not used (spare).
34	10A	Ancillary translator module run/start.
35	5A	Tow/Haul run/start.
36	10A	Fuel tank select switch.
37	10A	Auxiliary heater.
38	10A	Delayed accessory power.   AM/FM base radio.
39	15A	Left and right headlamp high beam.
40	10A	Rear parking lamps.   Clearance lamps.
41	7.5A	Not used (spare).
42	5A	Ford telematics run/start.
43	10A	Power Distribution Box run/accessory fuses.   Wiper relay coil.
44	10A	Customer access upfitter switch power.   Ancillary translator module run/accessory sense.
45	5A	Not used (spare).
46	10A	Climate control module.
47	15A	Fender direction indicator lamps.
48	30A Circuit breaker	Power windows switch (crew cab).
49	Relay	Delayed accessory power.

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=4700&languageCode=EN&countryCode=USA&marketCode=US&bookcode=O40467&VIN=&userMarket=usa&div=f