Riley, know that DeTomaso/Ford did many running changes to the Pantera's wiring during the short production run '71-74. There are at least three different factory schematics, and a supplement for the '80s-'90s cars where Ford was not involved. What most owners do is to get a copy of a schematic published as close to the build-date of the car as possible, then mark it up to exactly match your car, as variations are found the hard way.
The changes can be devices added, wire colors switched and functions changed. Some schematics are in the POCA Archives and vendors sell 24" x 36" laminated prints for garage use. One is folded in the back of original Owners Manuals but not always in reprints. The TSBs (Tech Service Bulletins- also in the Archives) are invaluable in describing in print the many running changes.
You will also need a GOOD VOM (volt/ohm-meter) and patience. As a last resort, there are a few shops & individuals that specialize in sorting out Pantera wiring. Some wear robes and pointy hats with moons and stars....