Can anyone tell me where the a/c fan blower is located on my dodge van?

Welcome aboard the forum. Always post your model year and engine size with any post. In this case, even without the model year it's a good bet your blower motor is up behind the glovebox, as it is with any Chrysler minivan. If you get under and look it's housed in a round black cylinder 6 to 8 inches in diameter.