This experience must have provided a thorough knowledge of and the ability to remove, replace, clean, and install parts, components and accessories; determine when parts should be cleaned and reinstalled or replaced; basic understanding of electricity and hydraulics and the skill to make adjustments and settings; basic understanding of on-board computer diagnostic systems, and other test equipment; skill in using basic automotive tools; read and interpret parts manuals and manufacturers repair manuals. Demonstrates to patrons, as requested or directed, repairs to automotive equipment that can be accomplished by cleaning, reinstalling, or replacing parts or components and systems, such as fouled spark plugs, leaky wheel cylinders, corroded mufflers, and worn brake shoes.