Book excerpt: This book covers British car electrical systems from 1950 to 1980. Particular emphasis is placed on the Lucas, Smith and SU components that were ubiquitous in British cars of the period. Each major system is given its own chapter, providing theory, component parts and full system operating explanations. Modifications are suggested for those wishing to bring performance and reliability up to more modern standards. Fault-finding charts, cross referenced to the appropriate pages in the book, are provided throughout.