1978 911 led bulbs all 4 corners blink

[Kropka]

I知 trying to get LED bulbs to work in blinkers but having strange behavior.

Case 1:
Only tail lights with installed led bulbs, front with incandescent bulbs using original Hella EP26 flasher:
Turning left or right - blinkers work properly, one issue is that indicators in tach dimly light up together despite which direction is turned on.

Case 2:
Tail lights and front lights using led bulbs with electronic EP26 flasher:
A: Main lights OFF - turning left - blinkers on left side blink normally while blinkers on right side blink at dimmed level - and vice versa turning right
B: Main lights ON - Turning left or right cause all 4 blinkers to blink at same bright intensity as if hazard lights were turned on
With Electronic flasher indicators in tach do not light up at all.

Also I知 using EP26 flasher (even though others on forums mention EP36) since original HELLA flasher included 4th prong C - ground (while EP36 does not have C ground)

I知 bit puzzled and hope someone had same experience and can chime in

[Showdown]

This may or may not be what you池e looking for, but when you switch to LEDs you have to modify the EP26 rely as such:

https://www.spokeworksled.com/ep26-mod-dual-indicator

[gamin]

there is an led use specific replacement for the flasher box. Have it in both cars and works great. Look on ebay.

[Kropka]

Originally Posted by Showdown

This may or may not be what you池e looking for, but when you switch to LEDs you have to modify the EP26 rely as such:

https://www.spokeworksled.com/ep26-mod-dual-indicator

Hats off to you sir, blinking issue is solved and indicators now show in tach.
There is new issue, tach indicators blink opposing side. If I知 turning left, left blinkers work but right indicator blinks, and vice versa.

I wonder if you can point me to the next step of this puzzle?

I have followed your diagram down to the color of the wire