The by James E. Duffy (published by Goodheart-Willcox ) is a comprehensive technical resource designed to teach the design, operation, and diagnosis of modern automotive electrical systems. This edition is specifically updated to align with the 2024 ASE Education Foundation Task List (MLR, AST, and MAST levels), making it a critical tool for those preparing for the ASE Certification Test A6 (Electrical/Electronic Systems). Key Updates & New Features