If you're describing the idler pulley or the tensioner pulley, it's probably a bad bearing. Pulley bearing failure is common and relatively easy to repair. Remove tension from the serpentine belt then turn the pulley back and forth with your fingers. It should make no noticable noise and should turn smoothly. If you can hear any grinding noise or if the pulley feels like the bearing is grinding, replace it.
Remove the serpentine belt and check the belt and pulleys for damage. While the belt is off, turn the alternator by hand listening for the noise.
There is no fuse for an alternator.
It could be a loose serpentine belt. Or if the alternator is going out either way its most likely a charging problem.
Your battery is not being charged because of a problem with the charging system Whether its a problem with the alternator / voltage regulator , the serpentine belt etc . you should have the charging system checked
There is no problem...the problem was the alternator. You have fixed the problem.
I am having the same problem with a 99 Protege. I have changed the alternator and aligned/cleaned the pulleys and the problem persists.I replaced the alternator, on my 1997 Mazda Protege, seven times before someone figured out why the serpentine belt kept breaking. It was the belt tensioner! It had to be removed and rebuilt. Now it is working like a charm!! And I havn't had to replace the alternator in over 3 months!!!!
There could be so many problems. Batery, starter, alternator, serpentine belt, no spark... the list is endless. spark plugs? spark plugs?
Without seeing your car... possibly burnt off the serpentine fan belt due to a seized alternator that was not charging. See if the alternator spins over by hand; that could be the problem. I you. Mark
Possible problem with the alternator. Could be source of the noise if it's bearing is going out.
Serpentine belts have an automatic tensioner, which cannot be adjusted. But your problem sounds like poor alternator performance, have it checked, at your local parts store most do it for free.
It is part of the alternator. If you are having problems keeping a charge or problem with high voltage, you might want to consider replacing your entire alternator.
yes the alternator can generate noise or whine in the speakers.