Volvo FH 4 represents the 3rd generation of serial heavy-duty vehicles of the Volvo company, which was produced in 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 and 2024. During this time, the model was restyled. In our article, you will find a description of the fuses and relays of the Volvo FH 4 with block diagrams, photographs and their locations. We will highlight the fuse responsible for the cigarette lighter.

The purpose of fuses and relays may differ from that shown and depends on the year of manufacture, modification and level of electrical equipment of your car.

Fuse and relay box

The main fuse and relay box is located in the center console behind a protective cover.

Check the information against your diagrams on the block cover.

F 110A 12 Volt Power Socket
F 2–
F 310A TV preparation, power supply
F 4–
F 5–
F 65A Body Switch (Optional),Power Supply
F 730A Body Electrical Center (optional), Main Power Supply 1 (30A)
F 820A Body Electrical Center (optional), Main Power Supply 2 (20A)
F 9–
F103A USB
F1115A Additional roof spotlights, EL1-
F1215A Roof Flashing Beacon Signal Lamps, EL4
F1315A Driver and Passenger Seat Heater, Alcolock, Engine Power Supply
F14–
F1510A Roof or Roof Light Stencil, EL 5
F1610A High beam inside stencil area, EL 0
F17–
F183A HMIIOM(Human Machine Interface Input/Output Module) Power Supply
F1915A BBM (Body Module (Optional)), Power Supply
F2020A DDM/PDM (Driver/Passenger Door Module) Right Power Supply
F213A SID (Additional Instrument Panel) Power Supply
F225A Sun visor, bed tilt power supply
F233A Tachograph, power supply
F245A Devices, power supply
F253A Toll Collection System, Power Supply
F26–
F2710A VMCU
F2820A VMCU
F2910A Right Mirror Heating
F3010A Left Mirror Heating
F315A DACU (Driver Assistance Control Unit),
F3210A APM (Air Pressure Monitoring)
F333A Wireless Remote Control
F345A Electric Front Lid Lock
F3515A Parking Cooler Fan Control Unit
F365A Camera
F3720A ABS/EBS, power supply
F3820A CCM (Climate Control Module),
F3920A Fuel Line Heater,
F403A Tachograph, ignition circuit power supply
F4115A EMS (Engine Management System), ECU main power supply
F4215A Controlled loads 1 EMS unit
F4310A Fuel Filter Heater
F4410A Controlled loads 2 EMS units
F4530A Power supply for the cabin tilt pump motor
F4620A ABS/EBS trailer,
F47–
F48–
F4950A Main power supply for chassis body (optional)
F5030A Auxiliary power supply for coffee maker
F5120A Windshield Wiper Motor Low/High Speed ​​On/Off
F5215A Power supply for the sunroof motor
F535A Video Switch,
F54–
F553A Alarm, power supply.
F5610A
F5710A Interior Lighting
F5815A Amplifier, Power Supply
F5915A Converter, Top Shelf Power Supply
F6015A Converter, Power Supply in the Dashboard
F6120A DDM/PDM (Driver/Passenger Door Module) Left Power Supply
F625A OBD Diagnostic Connector, Power Supply
F6310A CIOM (Cabin Input/Output Module) Power Supply
F6415A 24V Power Socket 1 in Dashboard
F6515A 24V power socket 2 in the sleeping area panel
F663A TIS (Transport Information System) and Telematics System,
F6715A Cigarette Lighter
F6815A VMCU
F6915A Cabin Parking Heater, Power Supply
F7020A TECU (Transmission Electronic Control Module)
F7115A Headlight washer pump motor
F725A
F7330A Body Electrical Equipment Center (optional), ignition power supply
F7420A Body Electrical Center (optional), ignition power supply
F7510A Refrigerator,
F7615A
F77–
F78–
F79–
F803A LECM (Living Environment Management Module),
F815A SRS (Supplemental Restraint System), Airbag, Ignition Circuit Power Supply
F823A GLONASS
F83–
F84–
F853A FMS (Fleet Management System) Connector Ignition Power Supply
F86–
F87–
F885A Alcolock, power supply
F89–
F9015A Seat Motor
F9110A FMS connector, power supply
F92Tachograph, adaptation-switch ADR
F93Microwave oven
F94Adaptation-switch ADR
F95Adaptation-switch ADR

Relay

  • K01 -.
  • K02 Relay, refrigerator
  • K03 Relay, sunroof motor 2
  • K04 Relay, sunroof motor 1
  • K05 Relay, front wiper on/off
  • K06 Relay, Front Wiper, Low/High Speed
  • K07 Relay, body electrical centre (optional), power supply
  • K08 Relay, additional equipment
  • K09 Relay, seat heater
  • K10 Relay, body electrical system centre (optional), additional spotlights
  • K11 Relay, power supply 4
  • K12 Relay, stencil with illumination on the roof
  • K13 Relay, flashing beacon signal lamps
  • K14 Relay, power supply 3
  • K15 Relay, high beam inside stencil area
  • K16 Relay, headlight washer pump
  • K17 TECU (Electronic Transmission Control Module)
  • K18 -.
  • K19 -.
  • K20 Relay, Ignition Circuit BB
  • K21 Relay, heated mirrors
  • K22 Relay, ignition
  • K23 -.
  • K24 Relay, adjustable seat
  • K25 -.
  • K26 -.
  • K27 Relay, Engine Management System
  • K28 Relay, Cabin Tilt Pump
  • K30 Relay, rear lift/crane activation
  • K31 Relay, additional front spot lamp EL6
  • K32 Relay, side working reversing light EL2
  • K33 Relay, working headlight, cab/body EL3
  • K34 -.
  • K35 -.
  • K48 Power relay, engine preheating
  • K52A Power relay, FLL motor 1-
  • K52B Power Relay, FLL Motor 2-
  • K65 Relay, starter-
  • K69 Relay, fuel heater
  • K70A Relay, adaptation – switch ADR3/SLP
  • K70B Relay, adaptation – switch ADR3/SLP
  • K71 Relay, audio switch, telematics, L+
  • K90
  • K91
  • K92
  • K95 Relay, Microwave
  • K96

Block near the battery

The high power fuse box is located next to the battery.

  1. 200A Body
  2. 100A FRC Driver’s Cabin Fuse & Relay Center
  3. 30A Front Chassis Control FCIOM
  4. 30A Chassis Control Center CCIOM
  5. 30A Rear Chassis Control RCIOM
  6. 30A Front Chassis Control FCIOM
  7. 30A Chassis Control Center CCIOM
  8. 30A Rear Chassis Control RCIOM
  9. 30A Front Axle Control FAS
  10. 40A Parking Cooler PCCU
  11. 23A ACM Aftertreatment Control Unit
  12. 23A Auxiliary Axle Control
Fuses and relays Volvo FH 4. Fuse diagram of Volvo FH 4.