The fault lights for my rear indicators constantly appear on the dash. I have replaced both bulbs and the lights went out for a day or so then came back on. One indicator also activates very quickly then goes back to normal after a few seconds. I have swapped bulbs around and again the problem goes away then returns. The bulbs are the right ones for the car. Any ideas guys? One indicator metal contact in the bulb housing appears alittle indented if you will so could this be the problem? Any ideas of what to clean the contacts with to eliminate this possible problem?