Moaning/Whining noise?

So I changed out my battery recently. Ever since I'm now hearing a low pitched moaning/whining noise that's asociated with engine rpms.

I've ruled out power steering as it doesn't do it when turning steering wheel fully in both directions.

Serpentine belt? Perhaps it was this that caused battery to not charge and need replacement?

Just odd that I now hear it or plain coincidence.

Thoughts?

 

I am most certainly shooting from the hip here (complete and total guess) but maybe it's something associated with the alternator? My logic is that it's electrical and belt driven, so it's closely related to the battery.

 

Whining noise is most likely caused by bad ground connection somewhere.

 

The sound appears to be originating from the drivers side.

 

All battery connections are snug. I sprayed terminals with protectant after cleaning & reconnecting cables.

 

If it's alternator, that's still under warranty (I have Toyota Platinum extended out to 6yr/90K miles).

 

I'm no electrical expert, is there any easy way to identify a possible bad connection?

 

Sorry, can't look right now, but google it and the is a Crutchfield page somewhere that gives you some tips

 

Probably picked the wrong denomination.

 

GD auto correct....just fixed!

 

I had the same whining noise, dropped the wife off and it went away.

 

Funny stuff!

Seriously though.....the noise is more of a low pitched moan/hum and less of a whine.

 

Go to Autozone or another parts house and have the alternator load tested.

As for the poster that is talking about Crutchfield and bad grounds. I don't think the noise is coming from the stereo.

 

Thanks, I agree, no stereo noise, so I don't think it's a ground issue. I'm guessing Alternator as well. I need a few things at Advanced Auto today so while I'm there I'll have them check the load. If it's the Alternator, off to the dealership.

 

You sprayed terminals BEFORE connecting them ?

Go back take them apart and clean everything off, then reassemble THEN coat them.

The protectant can be a "dielectric" which inhibits current flow, making your alternator work that much harder to charge battery which could explain the whine.

 

Sorry, I cleaned everything before I reconnected, they sprayed after. Apologize for the misstatement.

 

Charging system is fine. Just had tested at Advanced Auto. Now I'm thinking belt or a fully.

 

Update: Took it to dealership today and they could hear it but can't pinpoint it to anything. They noted my records for the record.

All of the following checked out fine:
Alternator
PS pump
Water pump
Belt & pulleys
Fan
AC compressor
Air pump

Didn't charge me for the diagnosis.

 

And the plot thickens! I hope you get it worked out man.