Your best bet is to:
1. Check your owner's manual: The owner's manual should have a diagram of the fuse box(es) and their locations. This is the most reliable source.
2. Look inside the fuse box covers: Many fuse box covers have a diagram printed directly on the inside of the lid.
3. Consult a repair manual: A Haynes or Chilton repair manual specific to your 1996 Ford van model will contain detailed diagrams and fuse box information.
4. Search online: Search online using "1996 Ford [Van Model] fuse box diagram". Be sure to specify the exact model (e.g., E-150, E-250, Econoline Club Wagon, etc.) for the most accurate results. Sites like Ford's owner site (if still accessible for that year) or various automotive repair forums might have the information.
Likely Locations:
Fuse boxes in 1996 Ford vans are commonly found under the hood and inside the passenger compartment (often under the dashboard).
Remember to always disconnect the negative battery terminal before working with fuses or electrical components to prevent short circuits and injury.