After looking through a few threads on here I may have figured out why my A/C isn't working. Inside the driver's side fender is the location for the diode and 2 relays for the A/C. Starting from the firewall side I have a silver canister type something that is mounted in a 2 prong holder. beside that is a square type 4 wire relay and then beside that is another 2 prong holder that is empty. I have located an open plug containing 4 wires underneath the relay in this area. Can anyone help me determine what I have and what is missing so that I can see if this missing component is the reason why my A/C does not work. Thanks for your help

 

I was missing a relay. Moderator can just delete this post. Thanks