To locate it:
1. Remove the rear passenger-side floor carpet: This often involves unclipping or unscrewing retaining clips along the edges. Be careful not to damage the carpet.
2. Inspect the area near the HVAC ductwork: The resistor is usually a small, rectangular component with several wires attached.
It's highly recommended to consult a repair manual specific to your 2001 Dodge Caravan model (including engine and trim level) for precise diagrams and instructions. A visual guide will make the process much easier and help you avoid damaging other components. You can often find these manuals online as PDFs.