I have had this issue for 6 months but it being cold, never bothered to try to fix it since the car still runs. What I turn the car on, the alternator or alternator belt squeal. Things that make the squealing noise. Front lights, break lights, heat, windshield whipers, leaving the car in drive at a red light, back window heater. Things that stop squealing noise. Turning lights off, putting the car in neutral, letting go of breaks in neutral, turning off the back window heater. Putting the car in neutral and slamming the gas seems to stop it too. I also notice a chirping noise when the car is idling. It doesn't do it when it's in drive. I changed the belts a while back.... Any ideas? The car is a 2002 Dodge Neon with about 98000 miles.