Diagnose, adjust, and repair various types of trailer equipment and systems including, but not limited to the following: aluminum and chem-lite, trailer brakes, air lines, auxiliary pumps and engines, liftgates, and brake chambers, Trailer steering systems, welding, fabrication, replacement of panels, body and framework. •Diagnose, adjust, and perform repairs on various types of trailer equipment, and systems including, but not limited to the following: aluminum and chem-lite, trailer brakes, air lines, auxiliary pumps and engines, liftgates, brake chambers, welding, fabrication, replacement of panels, body, and framework.