Wipers have a mind of their own.

[72timemachine]

I'm sure I am not alone with this problem. When turning on the wipers on my 1990 GMC 2500 single cab, they do not always work in the speed I select and when I go to turn them off, I sometimes have to turn off the ignition to get them to stop.

On top of this mess, the windshield washer motor does not work atop the lever when you push it forward. I jumped out the motor to the battery and the motor does work so I am thinking the wiper control lever assembly is either haunted or shot. Any thoughts?

Thank you for any help.