Question about glitch with 2005 Chevy Cobalt?

[Dave Oba Kob]

I drive a 2005 Chevy Cobalt, and every few months, when I turn on the one of the indicators, it starts ticking faster than usual. When this happens, I notice that when you look on the outside, the backlight doesn't blink, but the headlight does. Why does this happen?
Well, the bulb gets changed, and after a few months, the indicator acts up again.

 

[John L]

This is the bulb blowing out the reason it blinks faster is the timing is off due to the other circuit not blinking. You may have a bad back light you might want to replace the whole taillight assembly.

 

[if u aint first ur last]

well it either means that your blub for that turn singnal is going out or that the fuse is blow. if you change the blub it should fix it.