Randy beat me to it since I took too long writing but we came up with the same results.
Looking at a schematic, your images of "before" & "after" it looks to me that your "light blue" wire from your original switch is that "extra" wire that Midlife was referring to, that it goes nowhere on your dash harness (empty hole). Then it looks, from what I can gather out of your images, that all of your original color wires MOSTLY are accounted for except your new TS harness has a light blue wire INSTEAD of a dark blue wire and replaced the light blue wire with that yellow & black tracer. Translation: Unplug the yellow with black tracer from your TS harness and switch it with the light blue wire and get back with the results.
Your TS flasher source IS SUPPOSED to be (using YOUR image) the wire entering the back of the 4-way flasher side of the turn signal switch (not on the TS side of the switch ~don't ask why, it just IS this way) Look again at your picture (first image below) and notice the light blue wire closest to your thumb. THAT is where the TS flasher supply voltage enters this combination switch.
LEGEND of circuit number, wiring colors TYPICALLY used in TS switches 67-up and their function:
#460 YELLOW. HORN 12V supply
#482 BLUE/YELLOW. HORN. Horn(s) Feed
#385 WHITE/RED. 4-way flasher supply (12V constant feed THROUGH the 4-way flasher unit)
# 44 DARK BLUE. Turn signal supply (12V switched feed from ignition switch THROUGH TS flasher unit)
#511 GREEN Brake lamp feed from the brake lamp switch
#. 2 WHITE/BLUE. Right front signal lamp feed (note: #49 typically tied in at harness for indicator lamp)
#. 3 GREEN/WHITE. Left front signal lamp feed (note: #50 typically tied in at harness for indicator lamp)
#. 5 ORANGE/BLUE. Right rear signal lamp & brake lamp
#. 9. GREEN/ORANGE Left rear signal lamp & brake lamp
We might see another odd wire, such as my 67 has a red wire running down the switch for no reason, but these "extra wires typically dead-end into an empty cavity of the under dash harness.