To find the correct fuse:
1. Consult your owner's manual: This is the best resource. The manual will have a diagram showing the fuse box locations (there's usually one under the hood and one inside the cabin, often under the dashboard) and a legend indicating which fuse controls what. Look for fuses labeled "Power Windows," "Windows," or something similar.
2. Check both fuse boxes: As mentioned, there are typically two fuse boxes. Check both carefully.
3. Look for blown fuses: A blown fuse will usually have a broken filament visible through the clear plastic.
Important Note: If you're not comfortable working with car electrical systems, it's best to take your Grand Caravan to a qualified mechanic or auto electrician to diagnose the problem. Replacing the wrong fuse could cause further damage.