run engine,get a volt meter,connect it across the battery terminals,you should get a reading of 14.5 volts,if lower than this,you have either a faulty alternator,or earth strap to engine
mount,or loose fan belt not charging the battery,but french cars
electrics are rubbish ,as are their cars ,ask the guys who own renults who have the electric window motors burn out because of water ingress the the company know about but dont bother to rectify the fault ,
gts, May 2015