The car was riding well last night. I stopped home to drop my kids off then decided to go to the store. When I went to start the car I wouldn't start. All I hear is a buzzing/repetitive clicking noise, the anti theft light is flashing. I thought is was the battery but the brake lights still come on however no lights inside the car will come on. The buzzing sound is coming from the drivers side air/heat vent. Please help!