1989 Fleetwood Brougham d'Elegance|2018 Chevy Colorado Z71
Thanks, I'll have to pop it off and see just what failed in there. When the wipers are on that arm still flops around a little but you can hear something has lost it's grip inside. It sounds like a stripped gear or spline to me not knowing what the anatomy of the part is so I think you're right on with your assumption. Aside from this happening, the wipers didn't act right from the start of last summer. I dunno if it's the switch that's gone bad, but the intermittent settings don't work, they only move at full speed, and when you turn them off they pop up and down from their park position for a while until the car is turned off. Even then they'll sometimes keep doing their little pop up and down thing when the ignition is restarted. I have an extra switch so I'll swap that out and see what that does.....I'd bet that the spline in the arm is worn out and likely so is the master spline that permits the arm to seat in only one position on the drive hub. First, get a flat blade screw driver and with the arm slightly raised into its arc, pull the blade away from the glass. You will see a small stainless steel tab at the drive hub end. Slip the screwdriver under the tab and slide it away from the arm. This will release the arm and you will be able to remove it. Best to have a replacement arm ready just in case. Hopefully the spline on the drive hub will still be useable otherwise that too will need replacement.