Success! Thanks, in part, to 777stickman sending me a scan of the service manual pages I needed. MUCH APPRECIATED!
The switch snaps into position on the steering column of automatic-transmission cars. (Reverse switch is in the trans on manual transmission vehicles.)
My switch was broken at the tang that moves the electrical contacts that turn the switch on and off, and the switch itself was jammed (which probably caused the broken tang) so that it wouldn't go into the Reverse position. Once I got the switch completely off the vehicle, I polished-up the contacts, added some Syl-Glide lube...but it still wouldn't move properly once it was put back together. That's when I noticed that the tang was broken.
The new switch has an additional contact to show the vehicle is in "Park", but my truck has no electrical connector for that, so it's un-used.
The OEM number is/was 22509632. The "0" is hard to make out. I thought it was an "8" for awhile.
The switch adjusts by sliding the ridged piece under the locking tab. It's supposed to self-adjust by putting the trans in "Park", but I had to tweak mine by hand otherwise the backup lights came on only with the shift lever pushed towards "Neutral".
When I originally pulled the switch off the column, I pulled the switch off of it's snap-together mounting bracket. The new switch comes with a new mounting bracket.
Spread the "legs" of the bracket to pop the entire switch assembly into or out of the column locating holes.
