Whups, my new speedo’s turn indicator LED was only going on when left signal was running.
Thankfully, found this post on hondatwins that mentioned the orange and light blue bike lines were actually active lines for when left or right turn signal was on — not that they were positive and negative general lines. It also mentioned a (cheap/simple, yay!) fix to use two 3-amp diodes and tie them in together. A quick putt-putt to Radioshack and $2 later…
I focus mainly on that in this image, but also some other related notes.
I also have my new speedo’s neutral LED light now turning on when bike is on (but not running) — will see tomorrow if it *also* properly goes *off* when shift up when bike is running.