TM  10-3930-669-20 16-5.    FRONT/REAR WINDSHIELD WIPER ARM REPLACEMENT (CONT). c. Installation. (1) Install wiper blade (9) on wiper arm (5) with screw (8) and lock nut (7). (2) Install   wiper   arm   (5)   on   windshield   wiper assembly  (6)  with  washer  (4),  nut  (3),  lock washer (2), and nut (1). NOTE Follow-on Maintenance: • Install rear stoplight assembly (Para 7-31). • Close mast assembly (TM 10-3930-669-10). • Remove wheel chocks (TM 10-3930-669-10). END OF TASK 16-16