I have been having issues with my battery going dead on a regular basis which has been getting progressively worse. Battery and alternator tested fine, so I started pulling fuses and found that a 10A fuse #15 labeled "Back Up" was drawing about 380mA. Now the problem is, I have no idea what Back Up is supposed to be. It seems to have disabled all electrical devices until the ignition is turned on. Any idea what component might be causing the drain? Anyone have a wiring diagram related to this fuse?