Sound could be coming from a weak belt tensioner.
1. With the engine off, locate the belt tension, underhood.
2. Start the engine and turn on the a/c.
3. Observe the tensioner to see if it is shaking/vibratiing rapidly [with the squeak seeming to follow it rythm].
4. When you turn the a/c off does the vibrations of the tension decrease?
Wednesday, June 19th, 2013 AT 7:12 PM