Got most of my modules re-LED'd to match the ones I put in the steering wheel buttons, still need to do each of the door modules, figure since they aren't as in my line of sight as the dash and console items are, they can wait.
HVAC controller is completely Trailvoyed (works fine, still useful, but damn sure isn't what it should/used to be) I need some white LEDs for the sliders, so it's gonna have to come back out anyway, but for the blue ones behind the dials, all of the LEDs are half brightness on the test bench (15V), and do not light up at all in the truck.
Tracing voltages, only the slider bulbs, and the 2 dial bulbs closest to the ribbon see full power, the other dial bulbs see half that. No idea how this happened. The jumpers I had previously on the backside of the board aren't necessary, and do not help anymore. A few test jumpers had some really odd behavior, like jumping 2 LEDs on one side of the board for one dial, caused the 3rd LED to go out completely, while 1 LED for the other dial went full brightness.
SOOO, looks like I'm gonna have to run jumpers all over the damn thing. Not looking forward to that, although I was able to confirm which pins on the ribbon are parking illumination and ground, so that's out of the way...