The diagram I posted is correct. However it is missing information, like power to turn signal switch as I said. It is a diagram for rear only. Does not address the front. It needs two more relays for that. I assume the person who posted it was helping someone do rear wiring on a 4 pin T/S. Don't know. i should have been more complete.
I don't have a clue how yours works or how you address the front. I need to explain the second diagram. It seems you have turned the relays into flashers I guess. NOT kosher IMO. If I understand correctly, you have a flash signal to the coil trigger 86. Once I explain how the relay works, in this configuration, you may see the advantage. We can not use the same method/notion, as the non brake 4 wire T/S does or a 7 pin does.
This explanation will use pinout numbers shown on the total diagram below. (second diagram) 1. These 5 pin relays are being used as routers unlike normal usage to protect a less robust switch from damage. The new use for the Sigstat 700 is just to turn on the left or right circuitry. Wires that used to go to the T/S, now go mostly to the circuitry. 2. Pin 87A and pin 30 are connected when no power to 85. This allows normal brake light action. 3. When 85 gets power thru coil of relay to 86 ground, it "latches". Pin 30 is then connected to 87. Not 87A. This shuts off brake signal and connects a "load" (the bulbs) to the flasher. Flasher heats up and delivers blink.
Because my first diagram has 85 and 86 reversed from the second diagram (which makes no difference) This following comment uses the first diagram. and Kevin's modification, pinout numbers.
The way I see the mod diagram and explanation is sending a flash signal to the 86 pin. That signal connects 30 and 87. Intermittently. Over and over, wearing out the relay. 87 is not connected to anything. Seems like you have the flasher flashing a relay. But I could be misunderstanding the writen explanation. Need a total diagram for front and rear and brakes for me to concede. I am not against anyone rigging lights up any way they want.
Here is the total diagram for it all to work. Easy to understand, examine and trust. Open for all to critique. In this diagram, 85 and 86 are reversed as to power and ground. makes no difference. Should work with 6V.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn