Ford 1999 Windstar Owner's Manual page 185

Roadside emergencies
5. Be sure that the cables are clear of fan blades, belts and other moving
parts of both engines.
Jump starting
1. Start the engine of the booster vehicle and run the engine at
moderately increased speed.
2. Start the engine of the disabled vehicle.
3. Once the disabled vehicle has been started, run both engines for a
further three minutes before disconnecting the jumper cables.
Removing the jumper cables
Remove the jumper cables in the reverse order that they were
connected.
1. Remove the jumper cable from the ground metal surface.
2. Remove the jumper cable on the negative (-) connection of the
booster vehicle's battery.
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