Drtheo, you are not stupid. Stupid is forever and has no cure. This site is useful for enlightening the ignorant among us. We were all born ignorant, but most of as are able to learn. So now, thanks to Denny, you are no longer ignorant about wipers.
Over the years, Denny and many others have de-ignorantized me about many topics relating to these trucks.
Welcome to Stovebolt!