May 01, 2026  
Catalog 2024-2025 
    
Catalog 2024-2025 [ARCHIVED CATALOG]

DHET 220 Electrical Theory and Systems

15 credits
This course teaches heavy duty electrical and electronic systems/subsystems focusing on the design, repair, inspection, removal, and installation. Students perform hands-on troubleshooting and test equipment usage.

Prerequisites: DHET 110 , valid Washington state driver’s license, and must be at least 18 years old by the end the last quarter in the program

Course Outcomes
Upon successful completion of this course students will be able to:

  • Follow safety practices involving heavy duty electrical systems
  • Diagnose, test, and repair starting, charging, lighting, and accessory systems
  • Troubleshoot electronic components used in Heavy Duty systems
  • Use test equipment to determine needed electronic  system repairs
  • Locate, remove, and replace jor repair major electronic components as per OEM standards
  • Effectively repair or replace wiring harness components connecting electronic subsystems
  • Interpret and explain the meaning of symbols used in electronic system schematics to colleagues
  • Explain the basics of electric and hybrid electric systems
  • Maintain high voltage batteries
  • Demonstrate multiplexing in heavy duty electrical systems

College-Wide Learning Outcomes
This course teaches to the college-wide learning outcome of Teamwork, the ability to participate actively and cooperatively in a group to advance a common goal.

Total Hours: 250 Theory (Lecture) Hours: 50 Guided Practice (Lab or Clinical) Hours: 200