I have experienced the Parasitic Battery Drain on my 2011 Ford Edge SEL and the fix was unbelievably simple. I experience very odd behavior with my SYNC software, such as filling the tank but didn't show full, getting an incoming phone call that did not match my uploaded address book (for example, my wife would call me, but the SYNC display showed some other contact that wasn't even close.) Same for outgoing calls, I would select the number from my iPhone contact list and when it dialed, a different name was shown on the SYNC display. Then I started having the dead battery symptoms, car not starting (just clicking sound), when I KNOW the battery was totally charged. Sometimes too I would get a weird flashing of the SYNC screen. I tried updating the software, but then I would get a message "You already have the latest software...". The solution? I simply did a Master Reset which resets everything to factory defaults. You lose all your Bluetooth devices, etc, but easy enough to link again. It's been 2 weeks now and not a single issue! So, before you start changing fuses, relays, etc, just try this simple Master Reset. It might work for you too.
Rare
