Join Date: Dec 2005
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Hello and welcome to the forum.
The year and model of Renault would be a good start,but it sounds like a bad earth to the left rear light cluster.It's either a connection to the cluster or the actual earthing point further back in the loom.
Currently in Lagdti's garage:
2004 Saab 9-5 HOT Aero and a 2001 Audi A3 1.8 Turbo