Why Electrical Fundamentals, Service Information, and Technician Training Matter [THA 508]

Recorded at ASTA 2026, veteran industry trainers G Truglia and Eric Ziegler challenge the industry to rethink diagnostic habits, technical education, and the responsibility of ensuring every vehicle leaves the shop safely.

From voltage drop testing and properly loading circuits to interpreting diagnostic results, G and Eric explain why scan tools and shortcuts cannot replace a solid understanding of how systems actually work. They also confront a growing concern: Are specialists following current OE service information, or relying on procedures they've used for decades? Through practical examples, candid opinions, and plenty of humor, G and Eric reinforce an important message: Professionalism in auto repair requires continuous learning, diagnostic discipline, and a commitment to doing the job right. What You'll Learn:

• Why electrical fundamentals, including voltage drop testing and circuit loading, are essential to accurate diagnostics.
• How relying on scan tools, assumptions, and diagnostic shortcuts can lead to misdiagnosis and unnecessary repairs.
• Why current OE service information must guide repair procedures, even when those procedures differ from past practices.
• How improper brake service and overlooked ADAS calibration requirements can create vehicle safety concerns.
• Why hands-on technical training builds deeper understanding and stronger diagnostic confidence.
• How shop owners can improve their return on training investments by having specialists share what they learn.
• Why sending multiple team members to training can strengthen knowledge retention and collaboration.
• How continuing education, accountability, and professional standards contribute to safer, more accurate repairs.

The best specialists combine diagnostic knowledge with manufacturer procedures and hands-on training to deliver accurate repairs, protect their clients, and uphold the professionalism of the auto repair industry. Eric Ziegler, EZ Tech Mentors.  Eric’s previous episodes HERE. G Jerry Truglia, Dorman Training, Listen to G Jerry Truglia’s other episodes HERE. ASTA (Automotive Service & Tire Alliance):  https://astausa.org/2027-Expo