2009 Impala LTZ. My drivers side headlight low beam I noticed was not working when I locked my car with the key fob then it would come back on when I would unlock it. I didn't notice that happening anymore but when you started the car the light would be off. Wait for it, if you honk the horn it would come back on and and stay on until you turned off the car. Well now that will not even work and the light will not come on at all. I have changed the bulbs checked the fuse's. I don't know what else to do.