whit are nice weather snow and ice my wiper stays in the up position when there off .i have try to clean the base and lower them by hand but they always come back straight up does anyone know why

Sounds like it wasn't put together right. Did you have someone do some work or has it always been like that for you?

no its after a snow storm the was a block of ice under my wiper and i think its the electronic modul that when caput the motor still work but the wiper are out a phase

Can you pop them off the spindles like in this picture?



Then check the spindle operation without the arms.
Maybe the splines are stripped.

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.

what i think its the motor that slip in the shaft and everything is out of phase i will check it tomorow

I think your problem is in the motor assembly. That is, something bent. Stripping splines in the wiper arms or bending the linkages never seems to happen.

no i have found my problem its a modul on top of the wiper motor call the crank sensor its more than 100$