The title pretty much explains it I have a brand new bulb installed and the turn signal blinks rapidly as if the bulb is burned out. This car uses dual filament bulbs only one filament lights up and the other doesn't. Watch the video below and you'll see more of this in detail
https://www.youtube.com/watch?v=l9L-IFlRIGQ&feature=youtu.be
https://www.youtube.com/watch?v=l9L-IFlRIGQ&feature=youtu.be