On a 1989 Dodge Caravan, the water pump is located at the
front of the engine, driven by the serpentine belt. It's generally positioned low on the engine block, near the timing belt (or timing chain, depending on the engine). Because it's driven by the serpentine belt, it will be close to where that belt runs.
To be absolutely certain, you'll need to consult a repair manual specific to your 1989 Dodge Caravan's engine (e.g., 2.5L, 3.0L, 3.3L). A diagram showing the engine components would pinpoint its exact location.
