Bad alternator, makes whining noise?
I have this whining noise coming from the front of my truck. Im thinking its the alternator since its in that general vicinity. If i give it gas you can hear it in the truck aswell as outside. It sounds just like a psd turbo winding up if go wot. It gets really annoying when your trying to listen to music and it drowns it out while cruising.
Is there any way I can check to see if it's not working properly? When I give it gas to about 4000rpms while in park the lights dim a bit. Is this a tell tale sign that its going?