Want to be able to move the wiper to down position on 2005 Kia Sportage

My Kia Sportage rear window wiper will not move. It is stuck in a upright position. My rear window defroster work so it has power to that area

Asked by for the 2005 Kia Sportage
Rear defrost has no connection to the wiper!!... Check fuses,, if fuses ok,,,,,, Turn key and rear wiper on and listen at the rear of vehicle... Is the wiper motor running but wiper arm not moving??