TM 9-2320-279-10-1Change 8 2-178.1M977 Through M985 General Operating Procedures (Cont)2-12. OPERATE WINDSHIELD WIPERS/WASHER (AIR).a. Turn Windshield Wipers On/Off (Air).NOTESome earlier vehicles are equipped with pull and turncontrol knobs.(1)Turn WIPER knob (1) clockwise to start and control speed of leftwindshield wiper.(2)Turn WIPER knob (2) clockwise to start and control speed of rightwindshield wiper.(3)Turn WIPER knob (1) counterclockwise to stop left windshield wiper.(4)Turn WIPER knob (2) counterclockwise to stop right windshield wiper.(5)If wiper stops in middle of windshield, slightly turn appropriateWIPER knob (1 or 2) clockwise until wiper is at bottom of windshield.Then turn appropriate WIPER knob (1 or 2) counterclockwise to stopwiper.b. Operate Windshield Washer (Air).(1)Push in and hold WASH knob (3) to spray cleaning fluid onwindshield.(2)Release WASHER knob (3) to stop washer spray.
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