kalboy01

1999 Lexus ES 300 (3000 V6 4 Cam). When I turn the ignition switch off, I hear a very faint buzzing sound coming from the center front, down low in the engine compartment which runs continually until I pull the EFI fuse. Hopefully someone can tell me what is happening. I'm not sure but this may very possibly be the cause of the complete drain of my battery if it just sits (not being started or driven for a few days).