This manual covers Mack Trucks models CXU, GU, and CHU, including the Granite, Pinnacle, and Titan variants. These heavy-duty vehicles are engineered for demanding vocational and highway applications, known for their ruggedness, reliability, and robust performance, powered by Mack MP series engines and featuring advanced transmission options. The extensive electrical systems, from powertrain controls and lighting to HVAC and driver assistance technologies, are integral to their operation and are thoroughly detailed within this resource.

This technical service and diagnostic manual provides comprehensive coverage of the electrical system troubleshooting and wiring diagrams for Mack CXU, GU, and CHU trucks. It is designed to assist Mack Truck technicians, fleet maintenance personnel, and independent repair shops in accurately diagnosing and repairing complex electrical issues. The manual includes detailed wiring schematics, component testing procedures, fuse and relay locations, connector identification, and systematic troubleshooting guides, enabling efficient resolution of faults and ensuring optimal vehicle uptime.

This manual covers Mack Trucks models CXU, GU, and CHU, including the Granite, Pinnacle, and Titan variants. These heavy-duty vehicles are engineered for demanding vocational and highway applications, known for their ruggedness, reliability, and robust performance, powered by Mack MP series engines and featuring advanced transmission options. The extensive electrical systems, from powertrain controls and lighting to HVAC and driver assistance technologies, are integral to their operation and are thoroughly detailed within this resource.

This technical service and diagnostic manual provides comprehensive coverage of the electrical system troubleshooting and wiring diagrams for Mack CXU, GU, and CHU trucks. It is designed to assist Mack Truck technicians, fleet maintenance personnel, and independent repair shops in accurately diagnosing and repairing complex electrical issues. The manual includes detailed wiring schematics, component testing procedures, fuse and relay locations, connector identification, and systematic troubleshooting guides, enabling efficient resolution of faults and ensuring optimal vehicle uptime.