2012 Ford F-250 fuse box diagram - StartMyCar (2024)

This F-250 has 3 different fuse boxes:

Passenger compartment fuse panel diagramPower distribution box diagramUpfitter controls (if equipped) diagram
TypeNo.Description

Fuse MINI

30A
1

Not used (spare)

Fuse MINI

15A
2

Upfitter relay #4

Fuse MINI

30A
3

Passenger smart window

Fuse MINI

10A
4

Telescoping mirror switch, Interior lights, Hood lamp

Fuse MINI

20A
5

Moon roof

Fuse MINI

5A
6

Driver seat module

Fuse MINI

7.5A
7

Driver seat switch, Driver lumbar motor

Fuse MINI

10A
8

Power mirror switch

Fuse MINI

10A
9

Upfitter relay #3

Fuse MINI

10A
10

Run/accessory relay, Customer access feed

Fuse MINI

10A
11

Instrument cluster

Fuse MINI

15A
12

Interior lighting, Lighted running board lamps

Fuse MINI

15A
13

Right turn signals and brake lamps, Right trailer tow (TT) stop turn relay

Fuse MINI

15A
14

Left turn signals and brake lamps, Left TT stop turn relay

Fuse MINI

15A
15

High-mounted stop lamps, Backup lamps, TT backup relay

Fuse MINI

10A
16

Right low beam headlamp

Fuse MINI

10A
17

Left low beam headlamp

Fuse MINI

10A
18

Keypad illumination, Passive anti-theft indicator (PATS), Powertrain control module (PCM), Brake shift interlock

Fuse MINI

20A
19

Subwoofer

Fuse MINI

20A
20

Power door locks

Fuse MINI

10A
21

Brake on/off switch

Fuse MINI

20A
22

Horn

Fuse MINI

15A
23

Not used (spare)

Fuse MINI

15A
24

Steering wheel control module, Diagnostic connector, Power fold mirror relay, Remote keyless entry

Fuse MINI

15A
25

Not used (spare)

Fuse MINI

5A
26

Steering wheel control module

Fuse MINI

20A
27

Amplifier

Fuse MINI

15A
28

Ignition switch

Fuse MINI

20A
29

SYNC, GPS module, Radio faceplate

Fuse MINI

15A
30

Parking lamp relay, TT parking lamp relay

Fuse MINI

5A
31

Trailer brake controller (brake signal), Customer access

Fuse MINI

15A
32

Moon roof, Auto dimming mirrors, Power invertor, Driver and passenger door lock switch illumination

Fuse MINI

10A
33

Restraint control module

Fuse MINI

10A
34

Not used (spare)

Fuse MINI

5A
35

Select shift switch, Reverse park aid module, Trailer brake control module

Fuse MINI

10A
36

Fuel tank select switch

Fuse MINI

10A
37

PTC heater

Fuse MINI

10A
38

Radio faceplate

Fuse MINI

15A
39

High beam headlamps

Fuse MINI

10A
40

Parking lamps (in mirrors), Roof marker lamps

Fuse MINI

7.5A
41

Passenger airbag deactivation indicator

Fuse MINI

5A
42

Not used (spare)

Fuse MINI

10A
43

Wiper relay

Fuse MINI

10A
44

Upfitter switches

Fuse MINI

5A
45

Not used (spare)

Fuse MINI

10A
46

Climate control

Fuse MINI

15A
47

Fog lamps, Fog lamp indicator (in switch)

Circuit breaker ATO

48

Power windows switch, Power rear sliding window switch

Relay

49

Delayed accessory

TypeNo.Description

Relay

1

Blower motor

Relay

3

Urea heaters [diesel engine]

Relay

5

Rear window defroster

Fuse FMX/JCase

50A
7

Rear window defroster

Fuse FMX/JCase

30A
8

Passenger seat

Fuse FMX/JCase

30A
9

Driver seat

Fuse FMX/JCase

30A
12

Driver smart window

Diode MINI

15

Fuel pump [diesel engine]

Fuse MINI

15A
17

Heated mirror

Fuse FMX/JCase

30A
22

Trailer tow electric brake

Fuse FMX/JCase

40A
23

Blower motor

Fuse FMX/JCase

30A
25

Wipers

Fuse FMX/JCase

30A
26

Trailer tow park lamps

Fuse FMX/JCase

25A
27

Urea heaters [diesel engine]

Relay

29

Trailer tow park lamps

Relay

30

A/C clutch

Relay

31

Wipers

Fuse MINI

15A
33

Vehicle power (VPWR) 1

Fuse MINI

15A
34

VPWR 2 [diesel engine]

Fuse MINI

20A
34

VPWR 2 [gas engine]

Fuse MINI

10A
35

VPWR 3

Fuse MINI

15A
36

VPWR 4 [diesel engine]

Fuse MINI

20A
36

VPWR 4 [gas engine]

Fuse MINI

10A
37

VPWR 5 [diesel engine]

Relay

38

Powertrain control module (PCM) [diesel engine], Electronic control module (ECM) [gas engine]

Fuse MINI

10A
39

4x4 hub lock

Fuse MINI

15A
40

4x4 electronic lock

Fuse MINI

10A
45

Run/start relay coil

Fuse MINI

10A
46

Transmission control module (TCM) keep-alive power [diesel engine]

Fuse MINI

10A
47

A/C clutch feed

Relay

48

Run/start

Fuse MINI

10A
49

Rearview camera system

Fuse MINI

10A
50

Blower motor relay coil

Fuse MINI

10A
52

PCM/ECM/TCM run/start

Fuse MINI

10A
53

4x4 module

Fuse MINI

10A
54

Anti-lock brake system (ABS) run/start

Fuse MINI

10A
55

Rear window defroster coil, Battery charge coil

Fuse MINI

20A
56

Passenger compartment fuse panel run/start feed

Relay

57

Fuel pump

Fuse MINI

20A
66

Fuel pump

Fuse MINI

10A
68

Fuel pump relay coil

Fuse MINI

10A
70

Trailer tow backup lamp

Fuse MINI

10A
71

Cannister vent [gas engine]

Fuse MINI

10A
72

PCM/ECM relay coil feed keep-alive power

Relay

74

Trailer tow left-hand stop/turn

Relay

75

Trailer tow right-hand stop/turn

Relay

76

Backup lamp

Fuse FMX/JCase

20A
82

Auxiliary power point #2

Fuse FMX/JCase

20A
83

Auxiliary power point #1

Fuse FMX/JCase

30A
84

4x4 shift motor

Fuse FMX/JCase

30A
85

Heated/cooled seats

Fuse FMX/JCase

25A
86

ABS coil feed

Fuse FMX/JCase

20A
87

Auxiliary power point #5

Fuse FMX/JCase

40A
89

Starter motor

Fuse FMX/JCase

25A
90

Trailer tow battery charge

Fuse FMX/JCase

20A
92

Auxiliary power point #4

Fuse FMX/JCase

20A
93

Auxiliary power point #3

Fuse FMX/JCase

25A
94

Upfitter #1

Fuse FMX/JCase

25A
95

Upfitter #2

Fuse FMX/JCase

50A
96

ABS pump

Fuse FMX/JCase

40A
97

Invertor

Fuse FMX/JCase

25A
100

Trailer tow turn signals

Relay

101

Starter

Relay

102

Trailer tow battery charge

28

Buss bar

TypeDescription

Relay

RELAY 1

AUX 1

Relay

RELAY 2

AUX 2

Relay

RELAY 3

AUX 3

Relay

RELAY 4

AUX 4

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Source: Ford F-250 2012 Owner's Manual

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2012  Ford F-250 fuse box diagram - StartMyCar (2024)

FAQs

Where can I find fuse diagram for my car? ›

To locate the fuse specification chart for your vehicle or to learn how to change a fuse, refer to the "Fuses" section of your Owner's Manual.

What is the engine room fuse box? ›

There are two fuse boxes, one located near the engine or under the hood and the other is located near the driver seat. The car fuse box under the hood protects engine components including engine control unit (ECU), cooling fan, ABS motor and battery.

What fuse is the running lights on a 2011 Ford F250? ›

The correct fuse for the tail light/running lights for the trailer on your 2011 Ford F250 Super Duty is fuse #30 (15 AMP) which is located in the interior fuse panel (Body control module).

What fuse is the turn signal on a F250 trailer? ›

It is fuse f2. 27 in the fuse box in the dash, 15amp.

Where is the secondary fuse box? ›

In most cases, the main fuse box is situated under the hood, near the battery, while secondary panels can be found in the passenger compartment, often hidden behind a removable panel.

How do you tell which fuse is which? ›

Small fuses generally identify the element speed using markings such as F, M, T etc, whilst larger fuses identify the element speed using markings such as gL, gG, aM etc. Some fuses use terms such as slow acting, fast acting, motor rated etc.

What is the purpose of the ECM fuse? ›

The ECM 1 is one such computer; it has a fuse is installed to protect the computer from sudden power surges or other component damage -- the fuse will blow before any damage can reach the ECM. Many component defects can cause your ECM 1 fuse to blow.

How do I know if my engine compartment fuse is blown? ›

Still gripping it with the puller, hold the fuse up to the light (or a light source) and look through the translucent bodywork. You should see a thin metal wire in there. If the wire is no longer a continuous thread and appears broken or in two pieces, the fuse has indeed 'blown'.

What fuses are only on when the car is on? ›

An ACC fuse, also known as an accessory fuse, is a switched fuse that provides power to accessories such as the radio, power windows, and interior lights. It is typically used for devices that require power when the car is turned on, but not when it is turned off.

What does DRL fuse stand for? ›

The DRL warning light, also known as the daytime running lamp, is an important part of your car's safety system.

What fuses control the dashboard? ›

The instrument cluster fuse manages the dashboard gauge of a vehicle. It uses electricity from the car battery to power various electronic components of the dashboard such as the different warning lights, gauges, and alarm systems. They include but are not limited to the following: Speedometer.

What is the starter signal fuse? ›

The start fuse likely feeds power to the terminal 30 pin of the start relay (the relay closes this contact to the starter solenoid and causes the engine to crank). Power comes from the battery, goes to the start fuse, then is sent to the starter solenoid when the relay closes.

How do I know if my turn signal fuse is bad? ›

Turn Signals Don't Work

This is the most common symptom of a faulty turn signal relay. Once the relay is broken, the lights won't turn on with the switch. On some vehicles, the hazard lights also rely on the turn signal relay, so those lights might also cease to function.

Does the turn signal switch have a fuse? ›

Turn signals only work when the ignition is on; hazard lights work whether the ignition is on or not. The two systems have separate power supplies, so they have separate fuses. You may have a blown fuse. When I turn my right blinker on, why do my hazard lights come on?

How do I find the fuse for my car? ›

In most cases, the main fuse box can be located under the dashboard on the driver's side. This is usually where all of the fuses that control major electrical components are stored. There may also be additional fuse boxes located in other areas such as under the hood or in the trunk.

How do you figure out which fuse is blown in a car? ›

Locating a Blown Fuse

Consult your owner's manual for the exact location of each. In most cases, a diagram that shows you the position and the name of each fuse can be found inside the fuse box. This will help you locate the fuse that is related to the vehicle component that has failed.

What does a fuse look like in a circuit diagram? ›

Flexi Says: A fuse in a circuit diagram is typically represented by a rectangle or a squiggly line. The rectangle is more common in American diagrams, while the squiggly line is more common in European diagrams.

Where is my fuse board? ›

Locating your fuse box

You must know where your fuse box is located, in case you need to turn the power off in the event of an emergency. Fuse boxes are commonly found in utility rooms, porches or under-the-stairs cupboards. You may also have one in your hallway or garage.

References

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