John Thornton

John operates a mobile diagnostic business in the Chicagoland area.  John assists his repair shop customers with both engine and transmission driveability concerns, module programming, bus communication issues, and electrical diagnosis.

John has over 30 years of diagnostic experience and is an ASE certified Master Technician with L1 certification.

John also conducts training seminars nationally for professional repair technicians through Autotrain, Inc.  These seminars combine real world problem solving with system operation.  These seminars focus on developing efficient diagnostic techniques through a thorough understanding of both the system under discussion and the diagnostic tools available.