See also:

The Federal Clean Air Act – U.S.
The Federal Clean Air Act requires vehicle manufacturers to furnish written instructions to the ultimate purchaser to assure the proper servicing and function of the components that control emissi ...

Working on your vehicle
Note the following before you begin working on your vehicle: ...

Single sweep
Move the lever upward from position 0 to sweep the windshield one stroke at a time for as long as the lever is held up. ...