Here is a picture of the column switches looking from below/behind and what the terminals are marked as on the switch.
ID and reference to where you can find these on the 1973 wiring diagram from Pelican.
The 31, 53, 53E, 53A & 53C are the Wiper switch (E, Tracks 6 - 10 on WD)
The PL, P & PR are the Parking light switch (E19, Track 30 on WD)
The 49A, L & R are the Turn signal switch (E2, Track 42 on WD)
The S, S- & 31 are the Dimmer(S) & Horn Switch(S-) (E4 & H, Tracks 16 & 17 on WD)
Jim
Note: in my picture I have mis-marked the 31, 53A, & 53B Terminals on the wiper switch. On closer look what I have
marked as 53A is really 53E and What I have
marked as 53B is really 53A and
31 is really S1. Yes I am over due to see the eye doctor
Click to view attachment