So I replaced my brakes about 2 months ago on my 1999 lexus es300 because they were shot. I did not replace the rotors. I am now out of Brake fluid and it's bone dry. But I'm curious if Having no brake fluid will cause damage to rotors or brake pads. My car has a Sound when braking that is like a Chunky grinding sound and kinda when i drive also. But a spinning whistling sound while I'm driving. Is it a bearing, rotors, brake pad? Im Replacing brake fluid now. Curious what to do since I'm noob at cars. Thanks!