You'll need to consult your owner's manual. The diagram in the manual will show you the exact location and label of the fuse. The manual should also provide a legend to help you understand the symbols used.
If you don't have the owner's manual, you can often find a PDF version online by searching "[year] Dodge Grand Caravan owner's manual PDF".
Without the owner's manual, locating the correct fuse can be difficult and time consuming due to the variations in fuse block configurations among even similar year models.