68 Barracuda dash panel help

RedFish said
Guess what ? Bench testing the bulbs makes no difference in the end.
The LED bases fit these sockets soooo poorly that bumps in the road can make them come and go.
The thing is... the contacts inside the socket should touch the bulbs wire pigtail which is backed up by glass.
Not only is the LEDs wire smaller but the glass changes to plastic. So even if the contact is there initially the wire will fade into the plastic which was thinner than the glass to begin with.
I'm done. Good luck to all

I solved that by backing the wire with a small peice of soda can aluminum contact cemented under the contact wire.
They all work fine now and are not touchy about being moved around.

1967 'cuda said
If I recall correctly, the LEDs have to be put in with the proper polarity, so I sometimes had to remove some of the bulbs and turn them 180' to make them work.

This is correct, and a VERY good point to bring up.
The polarity of the bulb in the socket is a MUST, and usually the cause of some of the lights not working.
As Del told me. "They are diodes you know" but I didn't think about it at first, but it hit me later as I was putting them in.

All of my brake, tail, and parking lights are LED's and it makes a HUGE difference in power draw.
It takes less than a quarter of the power it did with standard bulbs, so it is WAY easier on the turn, brake, and light switches.