Dec 05, 2025  
2025-2026 Catalog SVC 
    
2025-2026 Catalog SVC

AT 121 - Automotive Electrical I


Credits: 7
Variable Credit Course: No

Lecture Hours: 44
Lab Hours: 77
Worksite/Clinical Hours: 0
Other Hours (LIA/Internships): 0

Course Description: Fundamentals of electricity including series, parallel and series-parallel circuit operation; electrical measurement including voltage, amperage and resistance; diagnosis and repair of batteries, starting and charging systems, and vehicle lighting.

Prerequisite: AT 101 and AT 133 or concurrent enrollment; and placement into ENGL 99 or completion of ENGL 97 or CCB 97 or ODHS 97 with a C or higher; and placement into MATH 96 or completion of MATH 95 or HSC 44 or ODHS 44 with a C or higher.
Meets FQE Requirement: No
Integrative Experience Requirement: No

Student Learning Outcomes
  1. Conduct safe practice in the lab relating to automotive electrical systems, service hazards and safety.
  2. Correctly define and explain the operation of Voltage, Amperage, and resistance.
  3. Diagnose and repair a variety of electrical circuits by tracing power flow and explaining circuit operation.
  4. Repair a variety of vehicles problems properly by locating and use a wiring diagram for electrical diagnosis.
  5. Explain electrical safety rules while working in lab environment.
  6. Diagnose a variety of vehicle batteries and starting systems by correctly testing in the lab.
  7. Repair a variety of vehicle batteries and starting systems and replace components in the lab.
  8. Diagnose a variety of vehicle charging systems by correctly testing in the lab.
  9. Repair a variety of vehicle charging systems and replace components in the lab.
  10. Diagnose and fix vehicle lighting systems by correctly testing and repairing system-related problems to industry standards.

Course Contents
  1. Electrical and shop safety.
  2. Fundamentals of electricity.
  3. Circuit types, operation and testing.
  4. Using electrical test equipment.
  5. Diagnosing circuit failures.
  6. System components and control devices.
  7. Battery fundamentals, safety, testing and diagnosis.
  8. Charging system fundamentals, testing, diagnosis, and repair.
  9. Starting system fundamentals, testing, diagnosis, and repair.
  10. Lighting system fundamentals, testing, diagnosis, and repair.


Instructional Units: 9.25