Ford Super Duty (2018 year). Manual — part 79

Protected Components

Fuse Rating

Fuse or Relay

Number

Powertrain control module.

20A

1

1

Emissions - malfunction indicator lamp.

20A

1

2

Cooling fan.

20A

1

3

A/C compressor.
Engine brake.

Noise suppression cap.

20A

1

4

Mass air flow sensor.
Emissions.
Glow plugs.
Urea.

Compressed natural gas fuel control
module.

15A

1

5

Fuel sensor.

Not used.

—

6

Not used.

—

7

Not used.

—

8

Not used.

—

9

Heated exterior mirrors.

15A

1

10

Compressed natural gas relay.

—

11

Heated rear window.

40A

2

12

Not used.

—

13

Powertrain control module relay.

—

14

Horn.

20A

1

15

A/C clutch relay power.

10A

1

16

Rear heated window and heated mirrors
relay.

—

17

Trailer park lamp relay.

—

18

Not used.

—

19

Protected Components

Fuse Rating

Fuse or Relay

Number

Supplemental air heater bank #1 relay.

—

20

Not used.

—

21

Not used.

—

22

Not used.

—

23

Cooling fan relay.

—

24

Supplemental air heater bank #3 relay.

Glow plug module power relay.

—

25

Not used.

—

26

Trailer tow battery charge relay (if
equipped).

30A

2

27

Not used.

—

28

Run-start relay.

—

29

4x4 module.

10A

1

30

Adaptive cruise control.

5A

1

31

Run-start.

Anti-lock brake system module.

5A

1

32

Run-start.

Powertrain control module - ignition status
power run.

10A

1

33

Run-start.
Engine control module.
Transmission control module.

Blind spot information system.

10A

1

34

Run-start.
Front camera.
Rear camera.

Not used.

—

35

Blower motor relay.

—

36

Trailer tow battery charge relay (only on
non-trailer brake controller vehicles).

—

37

A/C compressor clutch relay.

—

38

Protected Components

Fuse Rating

Fuse or Relay

Number

Horn relay.

—

39

Supplemental air heater bank #2 relay.

—

40

Glow plugs.

25A

2

41

Trailer tow lighting module (if equipped).

40A

2

42

Front blower motor.

40A

2

43

Voltage quality.

50A

3

44

Body control module power.

Active front steering.

60A

3

45

Supplemental air heater bank #2.

50A

3

46

Cooling fan.

50A

3

47

Supplemental air heater bank #3.

Body control module run power 1 bus.

50A

3

48

Inverter.

60A

3

49

Body control module run power 2 bus.

50A

3

50

Body control module B+ feed.

60A

3

51

Anti-lock brake system pump.

60A

3

52

Supplemental air heater bank #1.

50A

3

53

Trailer brake control module.

30A

3

54

Climate controlled seat module.

30A

3

55

Auxiliary lighting module.

40A

3

56

Power running boards.

30A

2

57

Compressed natural gas fuel control
module relay.

30A

2

58

Protected Components

Fuse Rating

Fuse or Relay

Number

Anti-lock brake system valve.

30A

2

59

Not used.

—

60

Driver power seat.

30A

2

61

Auxiliary power point #1 (instrument
panel).

20A

2

62

Starter motor.

30A

2

63

Auxiliary power point #2.

20A

2

64

Trailer tow lighting module (if equipped).

30A

2

65

Auxiliary power point #3 (center console).

20A

2

66

Passenger power seat.

30A

2

67

Auxiliary power point #4 (USB charger, rear
center console).

20A

2

68

4x4 module.

25A

2

69

Auxiliary power point #5 (rear center
console).

20A

2

70

Not used.

—

71

Trailer tow left hand/right hand stop/turn
(if equipped, not present with trailer brake
controller).

30A

2

72

Not used.

—

73

Not used.

—

74

Fuel pump.

30A

2

75

Not used.

—

76

Wiper motor.

30A

2

77

Not used.

—

78