A couple of days ago we had a harsh frost, and the car was frozen. The windscreen wipers didnt work and i put that down to the car being frozen. However ater in the day, they still would not work. I have checked the fuses, they seem ok, the linkage is fine, and the relay is working as the rear wipers are working ok. Im at a dead loss here, can any one shed ny light on what could be wrong?