Which circuits are controlled by the 20 amp fuse labeled EFI main? My 09 limited has started a very strange issue. When you turn it off the CEL and oil light stay on but dimly. There is also some kind of hum or buzz coming from under the hood and the only way to stop it is to pull this fuse. The steering wheel does not lock when this happens. If left in this state it will drain the battery. It only seems to happen randomly. Going to start hunting down circuits to find the culprit but would really like to narrow it down. Also the smart key fob does not work to lock or unlock the doors when this happens and sometimes I get the green light on the start button but when pushed it does nothing. When it is running it has absolutely no idiot lights or running issues.