Why dose my car make a humming noise when i put it in drive and turn on the ligh

To be honest there is nothing that comes to mind. We would have to have you stop by so we can hear what you are hearing. If the noise does not increase with the movement of the steering wheel then we will have to check further. We are at 4020 Old Washington Blvd 21227 off of Washington Blvd and Sulpher Spring road. Please give us a call and we can get you in. 443-575-6641