The Windstar was significantly updated in 1999 - mainly cosmetic, but also some mechanicals.
Since this question crosses those model years - pre-1999 and post - the best source of a definitive answer is going to be an auto parts store. They will know 'fer sure if it's the same.
The power steering pump pulley nut is loose. Or the power steering pump bearing is bad. On my 1998 it was just the loose nut.
There is no power steering filter
The data link connector plug is typically located almost directly under the steering column, maybe just a bit to the left of it on the WindstarThe 2000 Ford Windstar OBD 2 port is under driver side dash below hood releaseThe 1998 Ford Windstar OBD 2 port is on bottom edge of dash; right of steering column
How do you replace a power steering reservoir for a 2000 odlsmobile interigue?
Is there two power steering pump on a 2000 Lincoln LS
Below and to the left of the steering wheel by the brake pedal . It has a cover on it.
in power steering pump. on front (with pulleys) of engine, should have cap that says power steering.
Inside the power steering reservoir
How can you tell if your power steering pump went out? How can you tell if your power steering pump went out?
How do you remove high pressure power steering hose 2000 odlsmobile intrigue
The system uses regular power steering fluid.
HOW MANY POWER STEERING HOSES ON A DAEWOO LEGANZA 2000