The wiper was OK but the windshield was frosted over. The heaters on those shop trucks had no defroster so you had to scrape the ice off. Once the cab got nice and warm you were OK

Photo taken at "C" Battery, 1st Missile Battalion, 6th Artillery Regiment - Mainbullau, Germany. The truck markings:

7Th Army - 196th Ordnance Detachment and Direct Support vehicle 28.

(M109A3 2.5 ton multifuel shop truck. )