The power steering fluid reservoir on a 1989 Dodge Caravan is typically located
under the hood, near the power steering pump. It's usually a small, clear or translucent reservoir with markings indicating the minimum and maximum fill levels. Look for a cap that says "Power Steering Fluid" or has a similar marking.
However, the exact location might vary slightly depending on the engine and trim level. Consult your owner's manual for the most precise location. It's the best resource for your specific vehicle. A picture in the manual will be invaluable.