Wiring diagram for 1969 f100 ranger 390 three on the tree with Overdrive
 

I'm need a diagram of the steering column wiring please ! This is a 2wd full size ranger
https://cimg8.ibsrv.net/gimg/www.for...878cc77f9f.jpg
https://cimg6.ibsrv.net/gimg/www.for...941132ff57.jpg

This hopefully will help you.
http://fordification.com/tech/wiring...9overdrive.jpg
My truck had the same set up.

Oops! My bad. I just noticed that you wanted the column wiring. The wiring for the columns in the trucks with OD isn't different from other '69s with non-overdrive manual transmissions.

http://fordification.com/tech/wiring...ghts_81-85.jpg

The wiring for turn signals and horn is included here. I couldn't find one that just showed the column by itself.

Anyone have a brief explanation of what the overdrive does and how it works?

Borg Warner Overdrive Transmissions explained LINK

1969 F100 390 3 M/T with O/D
 

The only wiring in the steering column is the T/S switch. It has nothing to do with the Overdrive (O/D).

The O/D is controlled by a cable that mounts to a bracket that's located under the dash to the left of the steering column.

O/D relay mounted on the firewall behind the carb, O/D kickdown switch located behind the accelerator pedal.


https://cimg5.ibsrv.net/gimg/www.for...8acc34fe84.jpg