This electrical wiring diagram applies for 2003 Honda S2000 car series. This manual is divided into 5 main sections based on the major function of the electrical system. Section one, electrical tools, contains description of special tools necessary for repair and servicing S2000 electrical system.
Section two, starting system, describing details specification and feature of the starting system which are component location index, circuit diagram, starter circuit troubleshooting, clutch interlock switch test, starter solenoid test, starter performance test, starter replacement and overhaul. Section three, ignition system; discuss the details of the ignition system which consist of components, circuit diagram, ignition timing inspection, and spark plug inspection.
Download the complete 2003 Honda S2000 Electrical (engine) Wiring Diagram here (47 pages of pdf file docs. PASS: wiringdiagrams21.com)