I've an 11 plate Aygo. The indicator lamp and dashboard light don't work when the lever is pressed to indicate left. They both work if the lever is partially moved and held, but not when fully pressed. Everything is fine on the right side. I don't know if this is relevant, but the first time I noticed this was after a very heavy persistent downpour, and the carpet in the driver's side footwell was wet. I haven't resolved that problem either