Yesterday I had about and half inch of ice on the windshield and wiper blade arms. After clearing most of the ice, I went in the cab and turned on the wipers to see if they would clean the rest. Nada, I left the cab to clear the rest of the ice and some big dummy (me) must have left them in the delayed position because the cab was full of smoke when I returned. Obviously I have smoked the control unit and don't where it is located and where to find a non OEM replacement. Any help would be appreciated.