To find it, you'll need to:
1. Determine your F-150's year and engine: This information is crucial. The engine type (e.g., 5.0L V8, 2.7L EcoBoost V6, 3.5L EcoBoost V6, etc.) will greatly affect the water pump's location.
2. Consult a repair manual specific to your year and engine: A Haynes or Chilton manual, or a digital service manual from a reliable source, will show you diagrams and photos of your specific engine, precisely locating the water pump.
3. Use an online parts diagram: Many websites (like parts suppliers' websites) offer exploded diagrams of engines. Enter your vehicle's year, make, model, and engine, and you should find a diagram showing the water pump.
Without knowing your specific F-150's details, providing a precise location is impossible.