In this new treatment of a fundamentally important subject, student technicians will quickly grasp electrical principles thanks to the author's straightforward comparisons between compressed air systems and electricity. An emphasis on troubleshooting helps cultivate key problem-solving skills that are vital to gaining an understanding of modern truck electrical systems. Numerous examples that feature the most advanced truck in the North American market, the International High Performance model, help readers grasp electrical theory within a high-tech context. Coverage of the latest topics includes body system controllers, multiplexed instrumentation, and the interaction between the various electronic modules on a modern truck.