Chevrolet Caprice Air Conditioner Compressor Relay

I Recently Noticed That My Car A/c Was Not Blowing Cold At All. I Checked Under The Hood And Noticed That I Didn't Even Get A "click" When...

I'm Trying To Fix My A/c In My 79 Caprice Classic. I Just Got The Car, But It Had Been Sitting A Lot A Rarely Used Over The Last Many Years...