* Damaged O-ring: The most likely culprit. The high-pressure line connects to the pump via a fitting with an O-ring seal. Over time, this O-ring can harden, crack, or become brittle, leading to a leak.
* Damaged line: Less likely, but possible that the line itself is damaged very close to the fitting, even under the nut. Corrosion or a previous attempt at tightening could have weakened the metal.
* Loose fitting: While less probable given your description, it's worth briefly checking that the nut is properly tightened. However, over-tightening can damage the fitting or O-ring, so only snug it properly.
* Damaged fitting: The fitting on the pump itself could be damaged, cracked, or corroded. This is less common than a bad O-ring, but possible.
What to do:
1. Safety First: Power steering fluid is messy and potentially harmful. Wear safety glasses and gloves. Have absorbent material (rags, shop towels) handy.
2. Identify the exact location: Carefully inspect the area to pinpoint the leak's origin. Is it definitely between the nut and the line, or slightly further away? A picture would help!
3. Try tightening (carefully!): If you're comfortable working on your car, try carefully tightening the nut *slightly*. A tiny turn might resolve the problem if it's just a loose connection. However, don't overtighten, as this can cause more damage.
4. Replacement is likely necessary: The most likely solution will be to replace the O-ring. You might find a pre-made repair kit online or at a parts store (specify it's for a 1999 Ford Windstar power steering high-pressure line). Replacing the entire line might be necessary if the line is damaged.
5. Professional help: If you're not comfortable working on your car's power steering system, take it to a mechanic. Attempting a repair without the proper knowledge and tools could cause further damage.
Important Considerations:
* Type of fluid: Use only the correct type of power steering fluid recommended for your Windstar. Using the wrong fluid can damage the system.
* Bleeding: After replacing the O-ring or line, you might need to bleed the power steering system to remove air bubbles.
Replacing the O-ring is relatively inexpensive and straightforward for someone experienced with car repair, but if unsure, professional help is strongly recommended. A failing power steering system can be dangerous.
