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This is a basic link for the Borg Warner system.
http://www.oldwillysforum.com/forum/...riveManual.pdf
These systems were used by a good portion of the US auto manufacturers at one time or another so wiring coding depends on the manufacturer. Color codes for the Ford, Lincoln, and Mercury cars were the same but Ford wasn't good about publishing color coded diagrams in their manuals. Diagrams are available from a number of sources though. On older cars with woven fabric wire coverings, the colors fade after about 10-years or so. It's hard to tell what color they are after 70+ years unless the wiring has been replaced much more recently with quality products. The coil control circuit has a white with red tracer wire from the coil to one of the rear side terminals on the kick down switch and a blue with orange tracer wire from the other rear terminal to the #6 terminal or orange solenoid wire depending on the solenoid vintage.
The kick down switch works just like it looks. The two terminals closer to the front mounted button side are spring loaded in normally closed contactor position and control the system ground to turn it on and off. The two rear most terminals are for normally open contactors that control the coil ground function for the momentary drop out. These switches can go bad after many years of swampy service.
My 1949 through 51 Lincoln and Mercury Overhaul Manual has the diagram with written in color coding for each wire. It doesn't list wire gauge though so a person has to replace wiring with the original gauge and not necessarily the gauge that is currently installed. Shade tree mechanics had a tendency to use whatever gauge wiring they have at hand to replace old wire that is losing it's insulation and breaking down. I've seen some pretty crappy shade tree fixes on these old cars.