Ford Edge completely loses all electrical. 20 min later, everythinh is fine

[GUEST]

I have a 2013 Ford Edge 6 cylinder with 224,000 miles. I was driving yesterday, and it quit. I mean, it went COMPLETELY DEAD. ALL POWER WAS GONE!!! Couldn't even unlock doors with unlock button. The ONLY thing that worked was the horn. PERIOD!!! NOTHING WORKED OR LIT UP OR ANYTHING!!! Once I put it in Park, it wouldn't even shift out of park.
20 min later, the power came back and i started it and it ran fine. Until about 20 min. later when it did it again. Again, after about 15 min, it came back on, and I drove 2 miles to my house.
(You know how when you disconnect your battery the radio goes to a preset station? This did NOT do that. everything was exactly like I had it. Which makes me think it WASN'T the battery.)

[carriedi]

Wow, that is strange. At first thought I would look at the ignition switch. However the door locks should work even though the ignition switch is off. The door locks work through the BCM. The part that is strange is: so does the horn. You need to hook up to a scanner and see if you have any codes for loss of battery power.

Looking at the battery junction box on the left side of the engine compartment would be the place to check for power at all the fuses. But, you have to check it when you have the power loss. jiggle the wires that go to the box. See if there might be a loose connection or wire somewhere.

Also, check the ground connections. make sure you have a good ground for the engine and body.