Yesterday I noticed my alternator was making noise so I turned on the lights, A/C etc to get a reading with my multi-meter. The reading was terrible, like 10.97 or something close to that so I knew the alternator was bad for sure. My question is when I turned on a/c it started making this constant clicking sound (never has done this before). Was this caused by the lack of power? Maybe the a/c was straining itself without any juice. Thanks for any help or advice you can give me.

 

At that voltage you are lucky the engine runs at all first order of business is get the alternator and battery load tested.

 

Yeah I was shocked it even started, it sounds terrible though. The battery tested good but the alternator is shot. It's the original with 150k on it.