Hello, I have a turn signal problem on a 2004 grand prix gt. The front right side stopped working a few days ago and left side stopped today. I changed the bulbs and they still don't work. The bulbs light up when the headlights are turned on but they don't flash for the signal. I checked the bulbs in the rear lights and they both work. Checked the fuse boxes for any relays that might be bad but it didn't have one labeled turn signal. I don't know where else to look. There has to be a flasher relay somewhere. Can anyone tell me where it is or what its labeled as?