2000 disco se7 and the front sunroof works fine and the rear has a mind of its own. It will open fine but closes when it wants to close. When I hit the button to close it and it closes completely, the sunroof ecu clicks 3-4 times. It's a good sunroof motor and lined up properly. The front doesn't make the clicking sound when I close it completely or even hit the close button when it's closed. Any ideas?