Job Description Help for Job Description. Opens a new window. Test drive vehicles and test components and systems, using equipment such as infrared engine analyzers, compression gauges, and computerized diagnostic devices. Test and adjust repaired systems to meet manufacturers' performance specifications. Repair, reline, replace, and adjust brakes. Review work orders and discuss work with supervisors. Confer with customers to obtain descriptions of vehicle problems and to discuss work to be performed and future repair requirements. Examine vehicles to determine extent of damage or malfunctions. Tear down, repair, and rebuild faulty assemblies, such as power systems, steering systems, and linkages.