Description

Understanding and Measuring Current: The Magic in Fast, Effective Diagnosis.

INSTRUCTORS: Adam Robertson and Gary Smith
LOCATION: Virginia Auto Service, 386 E. Virginia Ave., Phoenix, AZ 85004
DATES: September 2nd (Tuesday) AND September 4th, 2025 (Thursday)
TIMES: Dinner 5:45–6:15 PM, Class 6:15–9:30 PM

In electrical system diagnostics there are several parts, pieces and Physical Laws that dictate how the electrons will function. The measurement of current can tell an incredible story about the integrity and operation of circuits and components. If done correctly, it is usually a simple non-intrusive quick test. In our classes, we commonly state “if you want to win the electrical diagnostic game, it is all about properly measuring and understanding current flow”. With the use of inductive current probes and lab scopes we can use current flow measurements to increase our diagnostic efficiency and accuracy. Topics of this class will include:

• Description and operation of inductors (solenoids)
• Description and operation of motors and solenoids
• Proper scope and probe set-up
• Small discussion on electrical laws like Lentz, Kirchhoff, Ohm and others
  • How the Laws relate to the scope captures and how they help us diagnostically
• How to use current ramping and lab scope patterns for circuit diagnostics including
  • Injectors, solenoids, coils, fuel pumps, starting/charging, data networks and more
• Using current to diagnose common component failures like power windows and other accessories PRIOR to disassembly
• This class is suitable and recommended for technicians of all skill levels that want to enhance their diagnostic accuracy and efficiency.