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All Trucks›Print Sheets›Wiring Diagrams
Wiring

Wiring Diagrams3 modules. Pick one from the list to see its pinout and wire colours.

Pick one and only that diagram shows.

Fuse panel locations on this truck

PanelWhere to find itStatus
FRC (Fuse and Relay Center)Under the cover in the centre of the instrument panelVerified
EFRC (External Fuse and Relay Center)Under the hood, driver's side of the truckVerified
BBEC (Body Builder Electrical Center)Body builder access point fed from the FRCVerified
CCIOMCross member behind the gearbox - fed by EFRC FE01 and FE03Verified
RCIOMCross member near the first rear axleVerified
Wiring diagram
Vehicle ECU (VECU)
Volvo VNL 760 / 860 · 2018-2026 · Conn: CN1 / CN2
VIN: ______________
Rev: ______
Vehicle ECU (VECU)Connector: CN1 / CN2TorqueLibrary SchematicCKT | COLOUR | GAUGEVehicle ECU (VECU)CN1 / CN21KL30 RD 10 AWG+Battery +(unswitched)2KL31 BK 10 AWGGround (G101)5KL15 RD 14 AWG+Ignition (keyon)8CANH BK/WT 18 AWGJ1939 CAN High9CANL BK/GN 18 AWGJ1939 CAN Low3CN5:5 YE 18 AWGFuel LevelSensor7CN5:7 GN 18 AWGCoolant LevelSensor12CN5:12 BL 18 AWGInstrumentCluster18CN5:18 VT 18 AWGWarning LampDriverPin numbers on module edge | Wire colour: red=power black=ground blue=CAN green=sensor
Pins are numbered on the module edge. Wire labels show circuit number, colour, and gauge.
A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Wiring diagram
ABS ECU
Volvo VNL 760 / 860 · 2018-2026 · Conn: CN3 / CN4
VIN: ______________
Rev: ______
ABS ECUConnector: CN3 / CN4TorqueLibrary SchematicCKT | COLOUR | GAUGEABS ECUCN3 / CN41KL30 RD 10 AWG+Battery +(unswitched)2KL31 BK 10 AWGGround8CANH BK/WT 18 AWGJ1939 CAN High9CANL BK/GN 18 AWGJ1939 CAN Low4WS-LF YE 18 AWGLF Wheel SpeedSensor6WS-RF GN 18 AWGRF Wheel SpeedSensor11WS-LR BL 18 AWGLR Wheel SpeedSensor13WS-RR VT 18 AWGRR Wheel SpeedSensor20ABS-LP OG 18 AWGABS WarningLampPin numbers on module edge | Wire colour: red=power black=ground blue=CAN green=sensor
Pins are numbered on the module edge. Wire labels show circuit number, colour, and gauge.
A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Wiring diagram
Cab Cross I/O Module (CCIOM)
Volvo VNL 760 / 860 · 2018-2026 · Conn: FE01 / FE03
VIN: ______________
Rev: ______
Cab Cross I/O Module (CCIOM)Connector: FE01 / FE03TorqueLibrary SchematicCKT | COLOUR | GAUGECab Cross I/O Module (CCIOM)FE01 / FE031KL30 RD 12 AWG+Battery +(from EFRC)2KL31 BK 12 AWGGround3CANH BK/WT 18 AWGChassis SubnetCAN High4CANL BK/GN 18 AWGChassis SubnetCAN Low2CN5:2 YE 18 AWGFuel LevelSender5CN5:5 GN 18 AWGPark BrakeSwitch8CN5:8 BL 18 AWGAir PressureSensorPin numbers on module edge | Wire colour: red=power black=ground blue=CAN green=sensor
Pins are numbered on the module edge. Wire labels show circuit number, colour, and gauge.
A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
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TorqueLibrary — A research compilation, not an OEM manual. Green means published and traceable; amber means second-hand, so check it. Where nothing was published the page says so rather than guessing.
Built from OEM operator manuals, federal service bulletins and industry standards (SAE, TMC, Bendix, Michelin, ConMet, Accuride). Confirm every number against the manual for your specific VIN before you turn a wrench.