I think it might be the relay, as I have changed my stalk switch already, and that is a chore in itself, but if you look at that you can cheat a little and grind a few tabs off that stalk housing so you dont have to disassemble the entire steering colum, but my wiper in my REAR had an issus when I 1st bought it back in 2007, then it stopped it was fine till last winter so rather than ruining the glass I removed the wiper and then I could keep hearing that wiper motor still pulsing, so I took the fuse out, so I need to know where the relay if the rear wiper has one and try changing that to see if that fixes, I still need to see where that breakdown is for my gaskets for my motor, I still have a leak that needs to be repaired so if someone can send the link for those printouts with part numbers for my 2001 x5 bmw my motor is the 4.4 l , so that info will be helpful if It is not asking for to much, I had a site but i had 2 computers crash and the website I had is now gone !!