This manual offers detailed wiring diagrams for the Volvo FH(4) series equipped with the I-Shift Dual Clutch transmission system. It includes comprehensive electrical schematics that cover all circuits and connections related to the I-Shift Dual Clutch system. This guide is essential for technicians and engineers who need to diagnose, repair, or maintain the transmission system, providing clear and accurate information to ensure precise troubleshooting and proper system function in Volvo FH(4) trucks.