The Peterbilt 348 is a robust and versatile vocational truck, engineered for demanding commercial applications such as construction, refuse collection, and utility services. Known for premium quality and durability, the 348 typically features powerful PACCAR or Cummins diesel engines, paired with reliable Allison automatic or manual transmissions. Its design prioritizes operational efficiency and driver comfort, making it a trusted choice in the heavy-duty trucking sector. This model represents a blend of proven engineering and modern technology, built to withstand rigorous work environments while meeting stringent emissions standards.

This Electrical Wiring Schematics Manual provides comprehensive technical information for the Peterbilt 348. It details all electrical systems, including powertrain, chassis, braking, and instrumentation, offering in-depth diagnostic procedures, troubleshooting guides, and wiring harness diagrams. The manual covers component identification, connector maintenance, and wiring repair techniques, making it an essential resource for fleet maintenance managers, service technicians, and repair shops. Its purpose is to facilitate accurate diagnosis and efficient repair of electrical issues, thereby minimizing vehicle downtime and ensuring optimal performance.