Today for no apparent reason my car showed on the dash display that the right signal light on. I checked the wing mirror and all the indicators and all seems to work perfectly with no lamps blown. The strange this is sometime when I signal right the indicator noise makes a fast sound like when you have a blown lamp, but within a few moments corrects it's self. Odd as all the lamps are working. Any idea what could be causing the display in the dash to malfunction?