last week the amber warning light was on and my drivers side side light was out, then the next night while i was driving the side light came back on. But tonight my side light is out again, could it be the wiring. Also I went to halfords to buy a bulb and was told I would need to go to a fiat dealer ...is this the only way I can buy a bulb. My car is a punto active 1.2 registered new in 2004. Can anyone help