Hi Tarab. Unfortunately, traffic here on the Ford Fusion Club has dropped dramatically over the last few years, as you can see by the scarcity of recent posts. It is shame too, because we had a great group of members.
You may have better luck getting assistance if you post over on the Ford Fusion Forum, located here: Ford Fusion Forum
And just a wild Internet guess, which will likely not be correct: If the exterior door keypad is not illuminating, perhaps the keypad wiring is the source of the draw. Again, just a blind Internet guess.
Let us know how you make out and good luck.