So this has been a long standing issue. The left blinker only works when it's hot out. Under normal operation. The rear blinker works, but it makes the fast sound as if the blinker fluid was running low and nothing comes from the front. But when I've been parked on a sunny day or if it's pipping hot outside. The damn thing works like normal. No fast blinking sound and the font one turns on. What gives?
Now heres a kicker. I use hand signals when it is not working like you're suppose too. Drivers don't know hand signals. Nor do bicyclists.