The Porsche 928 S, a distinguished member of the Second Generation, represents a significant chapter in automotive history as a groundbreaking luxury grand tourer. Produced from 1978 to 1995, the 1985 model year specifically brought notable refinements. This front-engine, rear-transaxle V8-powered vehicle, with its 4.7-liter displacement and approximately 250-280 horsepower, offered a unique blend of performance and comfort, competing with other high-end GTs of its era. Its advanced engineering, including the innovative Weissach Axle for enhanced stability, underscored Porsche's commitment to driving dynamics and technological integration, setting it apart from the marque's traditional rear-engine offerings.

This manual serves as an indispensable resource for understanding and maintaining the intricate electrical systems of the Porsche 928 S. It comprehensively covers electrical system wiring diagrams, component integration, and location, providing high-level detail essential for diagnosis and repair. Key areas include detailed schematics for lighting, body electricals, instrument clusters, HVAC, audio systems, safety systems like ABS, and engine electronics. The manual offers guidance on interpreting circuit diagrams, troubleshooting common electrical faults, and understanding system interconnectivity, making it invaluable for owners and technicians alike in preserving the functionality and integrity of this iconic vehicle.