Sorry to dig up an old post, but didn't want to just make up another thread for the hell of it.
I was trying this function out to clean the front wipers, but when I had the key in, push down the wiper stalk, nothing. Then turn the key so the lights on dash lights up, push down wiper stalk, it does a full one wipe (up and down) and NOT the half wipe to the 12 o'clock position? is there something wrong?