Rear window curtains issue

[Themadscotsman]

Hi all,

 

My 2006 MZ Alphard has electrically powered curtains on the side windows and tailgate.

One of the curtains on the tailgate fails to retract or pull closed properly when the button is pressed.

When closed and I try to open them by button the passenger side curtain only retracts fully from the top rail and a little from the lower rail, and likewise if trying to close them the curtain only moves a little in from the outside edge.

I can manually open or close them by gently pushing/pulling the top and bottom runners simultaneously and there is no resistance.

I think it has to be cable operated and would like to ask if any members have any experience of these curtains?

All advice gratefully received before I start opening up the tailgate to have a look.