Got the new wiring harness from AdMore today, and it works perfectly.
Now, on my v35 PLX side cases, where the red reflectors used to be, I have a) running lights, b) brake lights, c) turn signals. And of course, emergency flashers.
Will feel even more like I'm doing all I can to be seen by the idiot in the car behind me.
Going to post some new pictures soon in the Pictures section, as soon as I get the latest round of mods done.