How do I get the wiper arms back onto my wiper motor? Do I remove the cowl or the motor from the firewall? Thanks

 

I'm not to sure exactly where they came off. Post up some pictures. I will move this to the Tech section.

 

yes, remove cowl, replace nylon keepers on the end of each piece of linkage. can get them at any auto part store. careful not to mix up linkage pieces while apart easy to get backwards and upside down. you will have to remove each wiper hub but not the motor.
last, when you install the nylon keepers make sure they pop into place, need pliers to press them in............

 

I Have the same issue, how exactly do you get the cowl off?

 

screws visible when hood open where cowl bends down against the firewall and one screw each side by fender. also one screw visible on top. also will need to remove the window washer water line when lifting the cowl off. my advise is to cut the line at the Y and remove the little piece with a razor blade later. if you try to pull off you will break the Y water feed gizmo, been there!