99 SL 500

When I used the the headlight wipers this morning the right wiper got stuck in the upright position and the washer pump continued running until I turned off the lights. I shut off the car and then tried the headlight washers again. The left operates normally, the right doesn't move and there is no washer fluid is being squirted. I removed and re-inserted the # 2 fuse and the right wiper returned to the proper position but but ultimately got stuck in the same position when I ran the headlight cleaners. I pulled the wiper away from the headlight so I know it is not getting caught anywhere on the lens.

Thanks for any help