If I had to guess I would say you have a short in the electrical system that slowly drains the battery as it sits.
battery is low or almost dead
Most liley cause is an ignition off drow on the battery. Something is staying on when you shut the van off. Check dome lights, glove box lights, etc.
Dead battery?
AnswerCheck battery cables for looseness or corrosion Check ground at the end of the battery cableMake sure battery is fully chargedTake a look at the neutral start / transmission range sensor too.
Try getting a boost.....that'll help
You may have a weak battery. Your starter may be bad.
you drain your battery when you leave your lights on
Well not the starter. The starter is used to start spinning the engine and draws its power from the battery. The alternator uses the engines belt to recharge the battery and to power the cars electronics as well as lights. When you shut the engine off, the power then draws from the battery.
dead battery or bad starter.
Just had the same problem with my 03 Windstar, problem went on for about 3months. Finally replaced the alternator and have not had a problem since.
battery
There are a few reasons why a 1997 Ford Windstar may not start. It could be the alternator, battery, bad plug, or even the starter.