Turn Signal Help

[abn373]

I am beyond frustrated and need some smarter brains to see what I must be overlooking.

I have an early 1973.
OEM Auto column,
OEM Hazard switch on dash.
Centech harness I installed in 1997.
Column harness and dash harness do NOT connect via a connector and wires are connected individually.

All lights were working and have for 20 years.
I removed steering column to change dash and decided to replace the turn signal harness.
I was very careful to rewire it identically, but some of the new harness wires did not match the 73 OEM wires.
When the dash, column, etc. were all back in, I checked, and all lights worked like they should.
I recall checking each mode of lighting (turn signals, brakes, marker lights, hazards, headlights, etc.)
I am now questioning my sanity a bit, but I am really sure I checked everything, before I decided to switch to LED.

So, I got a full vendor kit to go all LED, inside and out.
Front and side and rear markers worker.
Headlights I did separate, but they work fine.
Reverse lights and brake lights work.

The Centech has 2 flasher modules. I used two LED rated flashers and no turn signals or hazards.
The I realized polarity is reversed in both connectors so I got different flashers with polarity reversing adapters...
4-way hazards now work 100% (to include dash indicators).

HERE IS CRAZY PART: If I put lever in left turn mode, both front lights blink and the right rear blinks and the left rear is OFF.
If I turn to right turn mode, again both front signals blink, the left rear blinks and the right rear is OFF.
The dash indicator shows both sides blinking like when in 4-way.
If I reverse the polarity, it goes back to none of the blinkers turn on or blink.
So thinking it was the LEDs, I swapped all four bulbs back to regular filament bulbs as a test...and the EXACT SAME issues are still present as the LED bulbs.
That makes zero sense to me.
I need a 2nd set of brains on this, because mine is frazzled after messing with this for 2weeks+
I hope it is something so simple that I don't see it.
Sorry, about the long post, I am just trying to be detailed.
Thanks fellas

 

[Viperwolf1]

Turn off or unplug the hazard switch and see what happens.

 

[Brush Hog]

Check dash to firewall
Ground. When I did my painless harness I had all sorts of issues with turn signals and all the other lights. Was all because of bad grounds.

 

[abn373]

Check dash to firewall
Ground. When I did my painless harness I had all sorts of issues with turn signals and all the other lights. Was all because of bad grounds.

The ground should be solid, I have both of the flasher modules grounded to a grounding bus panel, not to the dash on a bolt...BUT...I do have both flasher module's ground wires spliced together into the same dedicated ground wire running to that block That would seem strange to cause the issue, but maybe?