Well, this has been going on for some time now but I'm starting to get sick of it; my alternator is making a whining/high frequency sound as I'm driving and even while I'm at idle. I replaced the alternator a little over a year ago and it's been doing it for a few months. I'm not having any electrical problems or any lights dimming or problems with electrical power. It's just annoying; if I open my left vent to allow air to circulate I can even here it more. It generally stays "on" and never goes away. Any thoughts or cures?