Just went out to start the expedition (2008 EL with about 35000 miles). I got in, the power running board opened, started to turn the key, the power seat started forward, it made one very short noise as if it were going to start, then the power went completely out. It has no lights, no power anything, and it won't even try to start. The battery has a green "eye". Is there some sort of master relay? Worst part is, without electric, I can't get it out of park to drift it forward. HELP!!