ok mate i had the same prob as you and i had even gone out and brought a new stalk but still nothing
i looked up this problem i think on the old web site b4 it went down`the master`had the answer though.but it is a pink relay that controls the main beam.i fitted one in one and it all worked
im not to sure if u can get the relay from renault though but i managed to get one from cgb.
ive taken a pic where the relay sits.its a 12 volt lucas relay(pink) sits in a cream conector.soz pic is bitty taken off my phone.just to show u where there relay is
good luck with your project