This manual provides comprehensive electrical service information for Volvo FM Series and FH Series trucks, including specific models such as the FM9, FM12, and FH12. These heavy-duty vehicles, produced up to approximately 2002, are known for their robust engineering, reliability, and suitability for demanding transport applications. Volvo's legacy in the commercial vehicle sector is built on innovation and driver safety, with these truck platforms embodying that commitment through advanced engine technologies like the D9 and D12 series, and versatile transmission options including the I-Shift automated manual transmission.
The scope of this wiring diagram manual is extensive, covering the complete electrical architecture of the vehicle. It details wiring for all major systems, including powertrain controls, lighting, braking systems (ABS/EBS), chassis electronics, and cabin amenities. The manual is designed to assist professional mechanics, fleet technicians, and advanced users in diagnosing and repairing electrical faults. It includes detailed component identification, fuse and relay information, troubleshooting guides, and wiring harness illustrations, ensuring efficient and accurate maintenance and repair procedures.
VOLVO TRUCK Wiring diagram FM9 FM12 FH12 MANUAL UPTO 2002
Contents
Example of wiring diagram ................................................................... 2
Component wiring diagram index ....................................................... 5
Component wiring diagrams ................................................................ 8
Illustrations index ................................................................................ 76
Illustrations ........................................................................................... 77
Fuses ................................................................................................... 137
Relays ................................................................................................. 139
Wiring harness illustration index ..................................................... 141
Earth connections ............................................................................. 144
List of earth connections ................................................................... 146
List of connectors ............................................................................. 147
List of components ........................................................................... 154
Abbreviations ..................................................................................... 160
Cable colour code ............................................................................. 161
VOLVO TRUCK Wiring diagram FM9 FM12 FH12 MANUAL UPTO 2002
Contents
Example of wiring diagram ................................................................... 2
Component wiring diagram index ....................................................... 5
Component wiring diagrams ................................................................ 8
Illustrations index ................................................................................ 76
Illustrations ........................................................................................... 77
Fuses ................................................................................................... 137
Relays ................................................................................................. 139
Wiring harness illustration index ..................................................... 141
Earth connections ............................................................................. 144
List of earth connections ................................................................... 146
List of connectors ............................................................................. 147
List of components ........................................................................... 154
Abbreviations ..................................................................................... 160
Cable colour code ............................................................................. 161
