Are you using a multimeter to diagnose your parasitic drain? See what your base milliamp drain is on your multimeter after everything has been turned off and allowed to sit for say 5 minutes and then go through pulling and replacing each fuse and see which one when pulled causes a significant drop in the drain. Around 50 milliamps of parasitic drain is normal. If you're registering a great deal higher than that you'll find the cause or at least be directed in the right direction as you pull and replace each fuse and see which one causes a big drop in the drain when pulled.