Relays added. Here is a 2 relay system and a 4 relay system. I used the picture of John’s switch, I suspect the contact is a different shape. I’m guessing the indicator bulbs are in series with the rear bulbs, but I don’t know how they function. I’m just going off of what someone said on another forum describing cutting the black wires and adding grounds, and that caused the indicators to be opposite. For the two relay system the two black wires in the switch are cut to isolate the front and rear lamps, move the two wires and add grounds as pictured. I had to make a picture for the 4 relay system to understand what is happening. For the right turn, Power is sent through the turn switch through 2 contacts. One contact to the black wire internal to the switch that goes to what looks like a green cloth wire(I drew red) to #85 of the two right relays. #85 energizes the relays, connecting #30 to #87. The other contact (drawn as black) to #30 of the right Front relay, the right front bulb, and #87 of the right rear relay. The right rear relay connects this through #30 to the right rear bulb. The right front relay is now conducting the signal from the flasher to the 2 right bulbs through #87. Both right bulbs are getting a steady supply through the switch and a flashing supply from the flasher. I’m not getting how this works. Remove the Black and Green wire and this works, the four relay system is good for a 3 wire switch. Please verify, I only attended a 2 year college and that was only 25 years ago.
