The rear window wiper on my wife's X5 (2002 3.0i) works intermittently. It works when it is first turned on and then after a while just stops working most of the time in mid-swipe. If I open and close the rear window hatch, the wiper starts working again for a short period before stopping again.

Any ideas where I should begin to look? Does this sound like the rear wiper motor could be the problem? Any tips on diagnosing the problem? Has anyone experienced this problem on the X5?

Thanks.

__________________
Bassethound

2004 X5 3.0i, premium package
2006 X5 3.0i, sport and premium packages