I am so glad you guys mentioned grounding of wiper motor.
I am still unsure how to do this. I found the german thread about it, but unfortunately I am still confused after using Google translate.
Mr. Bergison did give wonderful advice, but I am not quite sure how to not cause an Home insurance claim.
I understand if there is not wire connected to inner case then it is ok. I can then just leave things as they are. Correct?
If there is a wire, then I need to remove it, but I am fuzzy on how proceed after this.
Thanks again for bearing with me! I am truly grateful for all advice.