Didn't work, and looking at my wonderful diagram it's easy to see why it won't work. I have in effect connected the left and right indicator together, this was confirmed when I put the Suzuki's indicator on ( Not the hazard warning light switch ) and all four came on. That's what I wanted yes, but if I use the left or right indicator switch all 4 come on. I can't indicate left or right on its own, so it's back to the drawing board
Let me be sure I have a proper understanding. The 4-way worked with the blinkers (turn signals) but not with just the 4-way switch? IF I have my thoughts correct, I know, I know. . . That's a big IF . . . give me a little time to see if I can get this worked out for you.