Ford 1998 Windstar Owner's Manual page 266

After you connect the jumper cables to the batteries:
Make sure that the jumper cables are not in the way of
1.
moving engine parts, then start the vehicle that has the
booster battery. Run the engine at a moderate speed.
Let the dead battery charge for a few minutes and then start
2.
the vehicle that has the dead battery. If the starter does not
crank, check for good, solid jumper cable clamp attachments.
It may take a couple of tries before your vehicle starts. If
your vehicle does not start after several attempts, you may
have a different mechanical problem.
When both vehicles are running, let them idle for a few
3.
minutes to charge the dead battery.
Take the jumper cables off in the following order:
Remove the negative ( ) end of the jumper cable from the
1.
metallic surface in the engine compartment of the vehicle
that needed a jump-start.
Remove the other end of the negative ( ) cable from the
2.
booster battery.
Remove the positive (+) cable from the booster battery.
3.
Remove the other end of the positive (+) cable from the
4.
vehicle that needed a jump-start.
After your vehicle is started, let it idle for a while to let the
engine "relearn" its idle conditions and drive it around for a
little while with all electrical accessories turned off, to let the
battery recharge. You may need to use a battery charger to
fully recharge the battery.
Roadside Emergencies
267