This electrical systems manual is one of a series of power mechanics texts and visual aids for training in the servicing of electrical systems on mobile machines. Materials provide basic information and illustrations for use by vocational students and teachers as well as shop servicemen and laymen. The ten chapters focus on (1) Electricity: How It Works; (2) Testing Tools and Equipment; (3) Storage Batteries; (4) Charging Circuits; (5) Starting Circuits; (6) Ignition Circuits; (7) Electronic Ignition Systems; (8) Lighting and Accessory Circuits; (9) General Maintenance; and (10) Diagnosis and Testing of Electrical Systems. Each chapter concludes with test questions. Answers to the test questions are appended along with a glossary of terms and 190 transparency masters. (A supplementary set of 35mm color slides is also available--see availability note.) (LRA)