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Volvo FM Fuse Box Diagram

avatar Jonathan Yarden Mar 25, 2021 · 5 min. read

In this article you will find a description of fuses and relays Volvo, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.


Main fuses

The main fuses are located in the main fuse box inside the battery box on the chassis.

Fuse Ampere rating [A] Use
1 125 Preheating
2 200 Hydraulic bogie lift / Superstructure
3 125 Cab
4 40 Secondary lighting supply


In relay and fuse box

The fuses in the electrical distributor unit are of the blade fuse type, two different types are used.

Blade fuses

Fuse Use Fuse rating [A]
F1 TPM 10
F2 Lighting, cargo area 10
F3 Loading lamp, fifth-wheel lighting 10
F4 Electrically adjustable seat, cab tilt pump, loading and fifthwheel lighting 5
F5 Instrumentation (kl. 30) 5
F6 Air drier 5
F7 Vehicle control unit, electronic immobilizer 5
F8 Instrumentation, TPM 5
F9 Range interlock, area interlock (in gearbox) 5
F10 NOx sensor, road toll 5
F11 Control unit gear shifter 5
F12 Control unit transmission/retarder 10
F13 Windscreen wiper 15
F14 Cigarette lighter, lamp storage compartment, centre section 10
F15 Water separator, fuel filter heater, water drain valve 10
F16 Differential lock, power take-off 5
F17 Control unit external lighting 5
F18 Horn, solenoid valve for compressed air horn 10
F19 Climate unit, FMS gateway 5
F20 Central locking, parking heater 10
F21 Fan, climate unit 15
F22 Courtesy light 10
F23 Air suspension 5
F24 Air drier, parking heater ADR, electrically heated rear view mirrors 10
F25 Power supply, ABS/EBS trailer 20
F26 Bodywork fuse box 30
F27 Electric window lift left side, electrically heated rear view mirrors 20
F28 ABS/EBS 20
F29 Coffee maker 30
F30 Electric window lift right side 20
F31 Main fuse for fuses 95–97 20
F32 Climate unit 20
F33 Electric cab tilting 30
F34 Amplifier 30
F35 Electrically adjustable seat 20
F36 Circuit for reversing lights, trailer 15
F37 Telephone, Dynafleet 5
F38 Entry lamps 5
F39 Electrically adjustable rear view mirrors 5
F40 Engine control unit 15
F41 Solenoid valves on engine, electric fuel pump 10
F42 Pre-heating relay engine, electrically controlled cooling fan 5
F43 Body builder control unit BBM 5
F44 Voltage converter for radio/12 V outlet 15
F45 Voltage converter for 12 V outlet 15
F46 Rotating beacon 15
F47 ACC 5
F48 ABS/EBS, switch EBS 5
F49 Air suspension/A-ride 3
F50 Phone 5
F51 Hydraulically steered axle 5
F52 Air intake heating, relief relay radio position 10
F53 Illuminated sign on roof 10
F54 Dynafleet, FMS gateway 10
F55 Airbag, seat belt tensioner 5
F56 Free 5
F57 Control unit gear shifter/Retarder 3
F58 D+ short circuit relay, only ADR 5
F59 Reversing camera, Dynafleet 5
F60 Hydraulically steered axle 5
F61 Theft alarm, Volvo link (SAM), Folding rear view mirror arm, Japan 5
F62 Free 15
F63 Alcolock system 10
F64 Toll system 10
F65 Central lubrication system 10
F66 Sun roof 10
F67 Bunk lamps, reading lamps 10
F68 Refrigerator 10
F69 12 Volt outlet 10
F70 ABS/EBS, trailer (kl. 15) 5
F71 Extra equipment 10
F72 Level adjustment system, headlamps 5
F73 Hydraulically steered axle 5
F74 Headlamp washer (high pressure) 15
F75 Electrically heated seats 15
F76 ADR D+ short circuit relay, Fan instrument panel 5
F77 24 V Power outlet, instrument panel 10
F78 24 V Power outlet, beside bun 10
F79 12 V for TV 10
F95 Central locking 10
F96 Burglar alarm 5
F97 Parking heater 15

LCM fuses

Fuse Use Ampere rating [A]
1 Direction Indicator lights trailer, Brake Lights and Headlight dipped beam, right side, Reversing Lights, Parking Lights rear 25
2 Headlight main beam left side, Fog Lights, Warning light, Warning signal 25
3 Brake Lights trailer and Direction Indicator lights rear, left side, Headlight main beam right side 25
4 Parking Lights trailer and Direction Indicator lights rear, right side, Brake Light left side 25
5 Reverse Lights trailer, Parking Lights front right side, Headlight dipped beam and Direction Indicator lights trailer, left side 25
6 Parking Lights trailer and Parking Lights front, left side, Direction Indicator lights front 25


Fuses in the battery box

Fuse Use Ampere rating [A]
1 Tachograph 5
2 Main fuses F95–F97 20
3 AdBlue system 20


To superstructure

56 X. Fuses for superstructure

Fuse Use Ampere rating [A]
1 Kl.30, B+ 15
2 Kl.30, B+ 15
3 Kl.15, driving position 15
4 Kl.15, driving position 15
5 Kl.61, alternator 10
6 Free 10

56 P. Fuses for superstructure (options)

Fuse Use Ampere rating [A]
1 Kl.30, B+ 15
2 Kl.30, B+ 15
3 Kl.30, B+ 15
4 Kl.30, B+ 15
5 Free 10
6 Free 10

Relays for bodywork, in front of passenger seat

Location Function
37 Parking lights
38 Pressure selection, dumper trailer
39 Free, for body builder
40 Free, for body builder
41 Free, for body builder
42 Spotlights
43 External engine start
44 Reversing light
45 Brake application (reverse lock)
46 Free, for body builder
47 Free, for body builder


WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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