The nearside rear lights on my Punto started behaving very oddly a few weeks ago, whenever I put the indicator on I noticed the indicator blinking noise sped up for a few clicks then went back to normal. I eventually checked the lights and discovered the indicator, brake and side light were all flashing but only very dimly (the reverse light joined in if I put it in reverse). I checked the bulbs & lo and behold the side light was blown. Everything worked fine after it was replaced. However, exactly the same problem has returned. Aha I thought, another blown bulb. Not this time though, they all work fine, and just to make sure, I checked each one in turn with a new bulb.
Any ideas what is going on here?