I just replaced my A/C compressor and now when I turn the A/C on there is a clicking noise the starts off slow and then increases quickly. It's very high pitched and scary! Could this be the relay that is in the same wire grouping on the condenser fan as the wire connected to the compressor?

Also I just replaces my master cylinder and now I have 0 brake pressure. I have bled the lines and made sure that all the fittings are tight leading in the the cylinder and also the main bolts holding it to the brake booster. It seems to have pressure when the car is off but once turned on the paddle goes to the floor. Brake Booster problems?

Any suggestions on either subject would be greatly appreciated!!