Electrical problem with 1.5 D.C.I renault Clio?

Could somebody please help. I have a renault clio and just recently started having electrical problems. When starting car the lights come on and wont turn off. My winscreen wipers wont work when lights come on. Now the lights stop on all the time car is running and so no windscreen wipers. Has anybody experienced any similar problems or possibly know waht problem may be. Many thanks.