To find them, you'll need to:
1. Consult a wiring diagram: A factory service manual for your specific 1996 Ford Aerostar is your best bet. These diagrams show the location and amperage rating of each fusible link. You can often find these manuals online through various automotive parts websites or repair manuals providers.
2. Visually inspect the wiring: Carefully examine the wiring near the positive battery terminal and the starter motor. Look for thicker wires that may be slightly discolored or show signs of melting. These are likely fusible links. Be very careful not to touch anything while the battery is connected. Disconnect the negative battery cable before beginning this process.
3. Trace wires: If you suspect a fusible link has blown, try to trace the wire from the component that's not working back towards the battery. This might lead you to a fusible link.
Important Safety Note: Working with the electrical system of a car can be dangerous. Disconnect the negative battery cable before attempting any inspection or repair. If you're not comfortable working on car electrical systems, take your Aerostar to a qualified mechanic. Incorrectly replacing a fusible link could lead to further damage or even a fire.