The blower motor resistor on a 2000 Dodge Dakota V8 is typically located
behind the glove box. You'll likely need to remove the glove box to access it. However, the exact location can vary slightly depending on trim level and specific options. Some Dakotas might have it slightly different.
Before you start taking things apart, it's always a good idea to consult a repair manual specific to your year and model Dakota. A repair manual will show you diagrams and provide step-by-step instructions, greatly reducing the chance of accidentally damaging anything.