Prerequisites: AGST-1121 and AGST-1122 Review of electrical fundamentals and introduction to basic electronics plus procedures and use of digital multimeter in electrical circuits. An introduction to combine and tractor electrical systems is included as well as troubleshooting techniques for circuit diagnosis using electrical schematics. Function, operation, and testing of semiconductors and transistors. Microprocessor operation, including inputs and outputs. CAN BUS theory of operation and testing is included. Testing of tractor circuits including lighting, accessory, safety, instrumentation and gauges is included in the lab exercises.