I just recently started hearing a high pitch frequency wine come from my car as the rpms go up so does the frequency if I turn the lights on the sound changed if I turn the fans on it changes if I turn the rear defroster on it changes someone help!!!!

 

You have a bad ground somewhere. I bet the sound is coming from your speakers too huh? The whine you are hearing is a bad ground. With all the electrical devices coming on that you mentioned changes the pitch and rpm's changes the pitch then you have a bad ground somewhere.

 

Ok that helps a little just now I gotta find that bad ground in my entire car.......

 

Did you recently install stereo equipment or have aftermarket stereo equipment? That is usually when people notice a whine...after they installed an amp or subs...or have them already and a ground has came loose. If you dont have any of that, start by checking the body grounds under the hood.

 

remove the annoying female from your car. lol

seriously tho i think highspeed nailed it. i think theres one under the intake tray that has caused issues before. right after i got my car i noticed the one on the lim wasnt connected. happy hunting and report back

 

What you are describing is noise from the alternator.

To confirm that the whine is indeed coming from the alt, unplug the alt while the engine is running.

If the noise ( whine ), goes away, then shut off your car and plug it back in.

Please don’t plug it in with the engine running.

If there is a problem with the alternator, the feed back could cause damage elsewhere.

After you reconnect the plug, connect a volt meter to the battery, ( engine off, what is the battery voltage?)
Then start the engine, what does the volt meter read? check the voltage at idle, then check the voltage at 2000 rpm.
Now turn on you head lights and fans with your engine running,
voltage reading should be 14.2v.

How old is your battery??, a weak, failing battery will cause the alt to overheat and whine like a passenger that is not use to
riding in a car that handles.

 

Again guys your the best thanks for the help the noise mysteriously went away so im going to let it be until it comes back thanks so much guys

 

I got a whine coming from my car cause i installed a new stereo and didn't sand the ground area.....just lazy as the whine doesn't bother me that much....gonna do it one of these days tho lol