This comprehensive repair manual provides detailed instructions and diagrams specifically designed for the 1979 Porsche 928 USA model, focusing on electrical system troubleshooting and repair. The manual's content mirrors the information used by professional garages and workshops, empowering you to diagnose and resolve electrical issues independently. The clear and concise explanations, alongside illustrative diagrams, make the manual accessible for users with varying levels of electrical knowledge. With this manual, you can confidently navigate electrical problems, perform repairs efficiently, and potentially save on costly garage visits.

The Porsche 928, a grand tourer produced from 1977 to 1995, was a revolutionary departure from the traditional air-cooled, rear-engined Porsche formula. In 1979, the 928 was introduced to the US market with several modifications, including a larger 4.5-liter V8 engine, a revised suspension, and a more luxurious interior. This particular model, the "USA Model 1979", stands as a symbol of Porsche's ambition to create a luxurious and technologically advanced grand tourer capable of competing with the likes of the Mercedes-Benz 450 SL and the Ferrari 308.

The 928's design was a marvel of engineering. Its front-engined, rear-wheel-drive layout provided a more balanced and predictable handling experience, while the powerful V8 engine offered effortless acceleration and smooth cruising. The 1979 USA Model featured a sleek, aerodynamic body, a spacious interior, and a range of innovative features, such as power steering, air conditioning, and a sophisticated suspension system. The 928's performance was undeniably impressive, with its 220 horsepower capable of propelling the car from 0 to 60 mph in just over 6 seconds. This combination of elegance, luxury, and performance cemented the 928's place as a true grand tourer, capable of traversing long distances in comfort and speed.

Unfortunately, a "current flow diagram" for a 1979 Porsche 928 USA Model is not readily available information and would likely be a complex diagram for a car. An electrical diagram of the car's electrical system, however, would be available through Porsche or through specialty automotive parts stores.