Review of electrical fundamentals including cranking motors, alternators, and ignition systems. An introduction to basic electronics is part of this course along with procedures and use of a digital multi-meter in electrical circuits. Techniques of circuit diagnosis using electrical schematics. Function, operation and testing of semiconductors and transistors. Microprocessor operation, including inputs and outputs. Testing of machine circuits including lighting, accessory, instrumentation, and gauges. Lab projects include the repair procedures and testing of cranking motors and alternators. Safety is stressed in this course.