When I did my complete repaint I decided to delete mine because it never worked well to clear the rear window anyway. I left the washer nozzle but welded a plug of sheet metal and filler in the place of the wiper arm. At some point though my rear window quit working, just clicks and I assumed it was the rear hatch module that I've read about often on here, but I never got around to check for sure. The motor works as I can "hotwire" it and it goes up and down. Although I've also read that there was something that senses the position of the rear wiper arm and would not allow the window to function if it thought the wiper was not at is "home" position. Never investigated that either, but I saved the wire pigtail off the wiper motor thinking someday if I found the problem was with the wiper arm position I could jump the correct wires to fool it into thinking it was always in the home position and have my window back. Honestly though I think just wiring the switch directly to the motor would be quickest and easiest.
Page 2 of my paint job thread on Yotatech has some pics of my hatch with the deleted wiper arm.
Operation: Olive Drab PATYWGN - YotaTech Forums