ok my right turn signal works perfect
my left blinks fast and the rear only blinks like the front bulb is out
but the bulb works with the parking lights
so i took off the corner to discover that the green wire was cut so i put it on........everything works great now.........untill night when i turn on my headlights and then my left blinker does not blink it just stayes on with the headlight.....but it works great with the headlights off..................so

 

could be the wrong bulb or you managed to put it in backwards... ive experienced both before with the same symptoms

 

do you just flip the bulb around?

 

mine does the exact same. it's something to do with the wiring. my corner light brokeoff while i was driving (and ended up being run over on dale mabry... don't ask) and i re-wired it and the light works fine EXCEPT for the turn signal

 

man...these coupes are a mess.because i have brand new bulbs that did work,and still do..but sometimes.the corners only work part time,but neither of the blinkers work all the time either,i need someone to do some wiring for me..