Here's a general overview of the steps involved:
1. Preparation:
* Safety First: Disconnect the negative battery terminal. This is crucial to prevent electrical shocks and short circuits.
* Gather Tools: You'll need a variety of tools, including:
* Socket wrench set (metric)
* Ratchet and extensions
* Wrenches (both metric and possibly SAE, depending on your specific vehicle)
* Pliers
* Screwdrivers (possibly Phillips and flathead)
* Jack and jack stands (essential for safety)
* Wheel chocks
* Gloves
* Shop rags
* New alternator (ensure it's the correct one for your Excursion's engine)
* Consult a Repair Manual: Obtain a repair manual specific to your 2000 Ford Excursion. This will provide detailed diagrams and instructions tailored to your vehicle. Haynes and Chilton manuals are readily available.
2. Accessing the Alternator:
* Location: The alternator is typically located on the front of the engine, driven by the serpentine belt. Its exact location might vary slightly depending on the engine (V8 5.4L or V8 7.3L Powerstroke diesel).
* Raise the Vehicle: Safely raise the front of the vehicle using a jack and secure it on jack stands.
* Remove Necessary Components: This is where a repair manual is crucial. You might need to remove or loosen:
* Parts of the air intake system (air filter housing, etc.)
* Serpentine belt (you'll need to properly route this again when reinstalling the alternator). Consult a diagram to identify the correct belt routing. Use a belt tensioner tool to release tension.
* Various brackets or shrouds that might be obstructing access.
3. Removing the Old Alternator:
* Disconnect Electrical Connections: Carefully disconnect the alternator's wiring harness. Take photos or make notes to remember the connections.
* Remove Mounting Bolts: Unscrew the bolts securing the alternator to the engine. These bolts are often located at the back of the alternator, making access difficult.
* Remove the Alternator: Carefully remove the alternator from its mounting position. It might be heavy.
4. Installing the New Alternator:
* Position the New Alternator: Carefully position the new alternator in its mounting location.
* Secure with Bolts: Tighten the mounting bolts securely, but don't overtighten.
* Reconnect Electrical Connections: Reconnect the electrical harness, ensuring all connections are secure.
* Reinstall Removed Components: Reinstall any components you removed to access the alternator (air intake, brackets, etc.).
* Reinstall Serpentine Belt: Carefully reinstall the serpentine belt, ensuring it's properly routed around all pulleys. Refer to a diagram.
* Lower the Vehicle: Carefully lower the vehicle from the jack stands.
5. Testing:
* Reconnect the Battery: Connect the negative battery terminal.
* Start the Engine: Start the engine and check for any unusual noises or belt squealing.
* Check the Battery Voltage: Use a multimeter to check the battery voltage with the engine running. It should be around 13.5-14.5 volts. A lower voltage indicates a problem.
Important Considerations:
* Powerstroke Diesel (7.3L): The alternator on a 7.3L Powerstroke is typically more difficult to access due to the engine's design.
* Belt Tensioner Tool: Using a belt tensioner tool is crucial for removing and installing the serpentine belt without damaging the tensioner.
* Professional Help: If you are not comfortable performing this repair yourself, take your vehicle to a qualified mechanic. The cost of professional labor will likely be less than the cost of damaging components or injuring yourself.
This is a simplified overview. Refer to a repair manual specific to your 2000 Ford Excursion for detailed instructions and diagrams. Remember safety is paramount. If you're unsure about any step, seek professional assistance.
