I have read many posts on squeals coming from under the hood that may be associated with the alterntor. Most if not all are accompanied by electrical issues. I have a constant (at rest and while driving) squeal that I have isolated to either the alternator or pulley bolted to the alternator (used stethoscope to search for sound). Upon replacing the pulley that was bolted to the alternator, i still have the squeal. So now i beleive it to be the alternator yet I have no electrical issues at all. Is there any other way I troubleshoot the alternator squeal?