Review of electrical fundamentals and introduction to basic electronics, plus the procedures and use of a digital multimeter in testing electrical circuits is covered. Troubleshooting techniques for circuit diagnosis using electrical schematics is included. The function, operation, and testing of semiconductors and transistors is covered along with microprocessor operation, including inputs and outputs. Testing of tractor circuits including lighting, accessory, safety, instrumentation and gauges is a part of the lab exercises. Electronic monitoring systems used on planting and harvesting equipment is also covered.