Yes, there is a fuse for the power windows in a 1999 Dodge Grand Caravan. However, the exact fuse location and amperage rating will depend on the specific options your vehicle has.
You need to consult your owner's manual. This manual will have a detailed fuse box diagram showing the location of all fuses and their corresponding circuits.
Don't rely on generic online information, as it may be inaccurate for your particular model year and trim level. The owner's manual is the definitive source.