* Hardtop: The fuse box is typically located under the dashboard, on the driver's side. You might need to remove a small access panel or trim piece to reach it.
* Convertible: The location is generally the same as the hardtop, under the dashboard on the driver's side. Again, access may require removing a small panel.
It's always best to consult a 1969 Ford Thunderbird repair manual or owner's manual for the exact location and a diagram of the fuses. These manuals often have detailed illustrations and explanations to help you easily find it. Online resources like online parts catalogs might also have diagrams.