Front left turn signal stopped working, checked bulb function & determined bulb was bad since with parking/head lights turned on, the bulb was not coming on. Replaced bulb, everything functioned normally for about 2 weeks. However, it recently began the hyperblink when activating left turn signal. I turned left signal on, while looking at front of car from outside I can see left signal is not working, however parking light still works, so I know it's not the bulb this time. I'm stumped, can anyone provide some input? Thanks!