Check the i/p fuse block. See if some relay is energizing on and off? If a relay is acting up, you may be able to put your finger on it and feel the vibration or heat. Also, check the fuse box under the hood, passenger side, that is close to firewall.
You should be able to remove glove-box liner, can you locate the noise?
Sunday, December 2nd, 2012 AT 6:19 PM