I am fixing this problem on a friend's '02 Clio. Passenger window goes down but not up. Lifter motor works fine off a battery, up & down. The switch is currently off the passenger side, I have it here with me, but the driver side still works fine, he's just gone out in the car and wound his window up & down to talk to me! I do think the N/S switch has to fitted before that window will work off the drivers switch though, otherwise there is no continuity.
All the best, Jon.
Jon Wearing, June 2011