The Ford Service Manual for electronics does a pretty good job of showing the wiring schematic for all of the wiring harnesses. It also shows what each fuse controls. I don't believe it will be available anywhere on the web.
Most of the descriptions of the fuses under the dash just say that fuse 23 controls the back up lights, and don't list all of the other things that are also controlled by that fuse.
95 Contour Zetec, ATX (wrecked, sitting in the barn)
95 Mystique Zetec, MTX
2000 Taurus SEL 3.0L Duratec
1994 Crown Victoria LX 4.6 V8
1993 Chevy Silverado 4.3 V6
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