My right turn signal stayed on when I turned it on earlier, so I thought that maybe one of them was out. I checked to see, and noticed that the fron one stayed on, and the rear was off, so of course I assume the bulb is out.
Later I turned it on, and it was flashing! I checked the rear and it was flashing! So what does it mean when one sometimes doesn't come on, and the other stays on...but then, sometimes it works fine?

 

Most likely either a bad bulb that the filament is sometimes making contact in or a problem starting in the socket itself.

 

Same thing happened to me in my old V6. Change the bulb, you'll be fine.

 

Might look at the bulb sockets.They get all corroded,and go south often.My02