Today morning i started the car in a really cold weather. When i started the car the battery light, all door lights came on and one of my headlight stopped working all of a sudden, and also when i rev the engine my dash dims. when i stop the car in one place. it brightens. and also when i stop the car the battery and all door lights goes away and when i start moving again it comes back. what can be the problem. please help! thanks

 

either the alternator or the battery. Have it checked out at autozone or o'reillys.