The alternator died first and drained your battery shortly thereafter.
The battery group is 65N for a 2003 Ford Windstar
On the Ford Windstar 2001 model, it is under the hood, next to the battery.
get an engine diagnostic check, a lot of different problems can contribute to your situation.
Open the hood and look see.
In the grill area behind the battery
Anywhere from $50 to $150
I would suspect the vehicle speed sensorSee "Related Questions" below for more
alternator is not charging battery, or loose - corroded connection on battery cables
On a 2001 Ford Windstar : The Power Distribution Box is in the engine compartment , between the vehicle battery and the drivers side fender
Facing the engine from the front of the vehicle, the battery is located in the right, front corner.
The Power Distribution Box ( which is " live " ) is located in the engine compartment between the battery and the drivers side fender on a 2003 Ford Windstar
Sounds like a bad muffler bearing to me .......