Nice! It seems like you figured out the connections, so lets see if you can help me out here...
I bought a fog light switch and I'm running a wire from the dash to the rear, and I want to connect it to the lamps to have the following setup:
1) V turns on with headlights (like yours)
2) Backup lights turn on when backup is engaged (like yours)
3) Triangle turns on with fog light switch
4) Triangle flashes with brake when fog lights are on
5) Triangle turns on with brake if fog lights are off (ideally... but optional at this point)
I'm assuming i have to run the fog light wire from the cabin all the way into the lamp through the rubber thingy, and probably disconnect one of their connections that merge 2 wires into one, and tap into one of them, but I haven't had a chance to do testing yet, since i don't have a garage and it's still winter in Chicago...
Any inputs? Any diagrams you may have drawn for the inner connections?
Thanks!!