Originally Posted by ohenry5
I had the same thing happen to my Bonneville, used the wipers with ice under them now wont go down "all the way", someone suggested I bent the mechanism or wiper arm, never could check cause I am not going to take the whole top off to look at the arm. Could be your problem.
If the Bonneville wiper linkage is like other linkages I've seen on GM cars, you'd have a tough time bending the linkage if you put it over your knee. Its quite tough. The wiper arms would bend or the splines would strip first.
You could fix this without removing the top of the cowl.