Gotta find out what the noise is with the key out first. You may be able just to track to source by listening very carefully. If not try the pulling of individual fuses until noise stops. Unfortunatly very common type of problem. If noise remains constant while pulling all fuses one at a time think perhaps you should pay some attention to your cd player as it may be wired to a direct 12v source and only has the in line fuse at best. Good test right away is if it plays cds with the key out. Unfortunatly you will probably have to jump start car or charge battery as I suspect is almost going to be dead with this drain by tomorrow morning. Disconecting one terminal now may save enough power to locate the noise later. Let us know what it was when you find it.