Diagnoses, examines, and investigates vehicles to determine causes of defective operation of engines, transmissions, differential units, generators, starters, pumps, air suspension systems, pneumatic systems, passenger lift assemblies, radiators, injectors, clutches, air conditioning systems, and other vehicle components. Documents all work performed including record of repairs on driver's defect cards; submits daily lift status reports to supervisor and dispatch; records all repairs logs; and prepares and submits weekly reports to supervisor.