cleaning the wiper motor

[84GMCSierra]

Good Morning everyone. I was wondering if there is a way to clean the wiper motor on my 84 Sierra? I live in Arizona, and although it's not near as cold as other states, my wiper motor is very slow when I first use it in the rain. I think I read somewhere that the old grease in the motor might be the culprit so I want to try a clean and regrease before replacement. My motor has the washer pump on it, but ti doesn't work so will try to see if it's plugged while I have the motor cover off, if possible.

 

[84GMCSierra]

Both High and Low speeds on my motor are the same. I tried to upload the video but it doesn't show up when I click on "attach files".

 

[fast 99]

wiper transmissions are most likely dry as well. Remove wiper linkage, 1/8" drill housing on back side, use a grease needle to lubricate. Seal hole with RTV.

 

[84GMCSierra]

Another question about the motor. Looking at new ones online there's a ground strap on it. Mine doesn't have one so should I add one or does it matter?