The Porsche 928 S, a USA Model produced in 1984, stands as a premium Grand Tourer celebrated for its sophisticated engineering and luxurious comfort. This front-engine, rear-wheel-drive V8 sports car, featuring a unique transaxle layout, was a significant departure for Porsche, offering exceptional long-distance touring capabilities. Its 4.7-liter V8 engine, producing 234 horsepower, combined with advanced features like Anti-lock Braking System (ABS) and a self-leveling rear suspension, positioned it as a technological leader in the luxury sports car segment of its time. The 928’s design and performance legacy, rooted in Porsche's renowned engineering excellence, made it a distinctive offering against competitors like Ferrari and Jaguar.

This Electrical System Service Manual and Wiring Diagram Supplement provides comprehensive guidance for the Porsche 928 S. It focuses on electrical system diagnostics and repair, covering essential components such as the Engine Control Unit (ECU), fuel injection, ignition systems, lighting, instrumentation, and various power-operated comfort features. The manual details advanced troubleshooting procedures, including circuit tracing, component testing, and wiring harness repair, alongside specific fuse and relay identification. Designed for professional technicians and experienced enthusiasts, this English-language resource, typically presented as a high-quality printed document, is crucial for maintaining the complex electrical systems of the 1984 Porsche 928 S.