Dash Light LED swap

[ChevyGuyNC]

Decided to use the day off to do the LED upgrade to the dash cluster lights.

Super easy to do. Swapped the bulbs, then reconnected the plug, and the battery cable while everything was loose to test... only a few worked... Ugh.

Tried putting old bulbs in, still nothing. Tried turning the bulbs 180, still nothing. Really stumped now. Ground wire/clip is still there. Printed circuit looks fine. Hard to believe so many bad bulbs out of the box, plus the original incandescent don't work either. Seemed to all work before I took it apart.

Took a break for lunch, going to head back out to the garage and check fuses, etc...

Why do the simplest jobs have to be so hard? lol

[ChevyGuyNC]

So... no blown fuses... use fine sandpaper and cleaned contacts... four work four don't. It's not the socket or bulb, as if I take a working one and put it in one of the dead spots it doesn't work. Same if I take one of the four dead spots and put it in one that works, it lights up.

Guessing that's a bad printed circuit...

[BigBird05]

Are you talking about the illumination lights? I only see 4 bulbs (gray wire) in that circuit. I see 4 more for the Brake lp, Rh turn, Lh turn and Hi beam.

[CarlsLQ9SS]

LED lights are polar specific. Basically they have a hot specific side and a negative specific side, the ones that are not working just needs turned 180 degrees in the socket.