wiper/signal/highbeam switch

Was driving rented mustang (im sure wipers tech is same on all fords), brand new mustang with 9k miles, between Colorado Springs and Denver, was snowing really hard, heavy wet stuff.. I started passing tractor trailer and it hit slush on road that covered my windshield completely with inch or...

I introduced myself yesterday morning before I decided to dig into the headlight situation. I went in armed with the knowledge that the multifunction switch (wiper/signal/high beam combination switch) on the column was the likely culprit. I had to prove it to the hubby though. Took my tool...