Dash LED Upgrade Doesn't Work - Because?

Personally If I was going to the work of LED conversion, I think I'd find something to SOLDER in place and avoid the nonsense of old sockets and PC board.

Yup. Polarity sensitive

I gotta wonder. If I had a wit, I'd be at the end of it by now. I marked every new LED socket with white paint, double checked the red dot on the bulb, tested every bulb/socket function with a couple jumpers off the battery, cleaned every contact point on the circuit board and checked every board contact point with an ohm meter. Nothing. Gotta move on for now. The old bulbs went back in. We're wanting to drive this to LA via the coastal highways in a week and I have other loose ends to tie up. I'll revisit this again when we get back and try to get my $75 worth joy out of these bulbs and sockets.