There is definetly a fuse. But ford likes to use a lot of different fuse panel configurations. I think they have a different one for each color vehicle.
Your owners manual will be the most accurate.
However, on my 2004 explorer and my 2001 Expedtion there is no way to drain the battery with a door ajar. I have kids. Doors get left open, lights get left on ALL THE TIME. THey usually go off by themselves after a while and it has NEVER resulted in a battery drain.
Quite often, what we think is a battery drain turns out ot be a bad battery.