Owner, Autotrain, Inc.
John Thornton 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... Read More →