Join Date: May 2007
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I'm 99.9999% certain you've lost an earth connection to your light cluster. Its extremely common on all car makes.
If all else fails and the advice given about checking the connections doesn't work make a new connection from the earth side of your wiring either to the bodywork of the car or the earth connection on the other light cluster.
Currently in len_0onx's garage:
Megane Sports Tourer