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Old 04-14-2012, 12:23:02 PM   #1
split70cam
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LED light on 1970 to 81 dash

Anyone install LED bulbs on 70 to 81 dash? I bought LED light and put them in with the correct poalrity offcoures but they do not work. The one light at the end of the circuit bord lights up and one is dim the rest are dead. They all work when connected individually to the power source. Is there some kind of electrical explaination to this? I know LED lights are tricky. Anty suggestions please. Thanks
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Old 04-14-2012, 12:34:53 PM   #2
vfw_1168
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You try the strip lights
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Old 04-14-2012, 12:51:27 PM   #3
split70cam
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no strip light. I just got the replacement bulbs, they look like the original but instead of filiment they have five little LEDs
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Old 04-14-2012, 12:56:48 PM   #4
Twisted_Metal
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Clean the contacts on the bulb holders with a tiny file.
The ones inside the holder and the contacts which touch the printed circuit panel.

I test the LEDs in the cluster with a 12V trickle charger before I install the cluster in the dash. It makes this job easier.

Good luck!
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Old 04-14-2012, 05:41:00 PM   #5
split70cam
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I did what you sayed and filed the plugs. and you are right. I tested the metal on the little plastic plugs they are not conducting electricity. I'm going to replace them. thank you.
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Old 04-14-2012, 07:06:03 PM   #6
Twisted_Metal
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Some of the LED bulbs don't have the wire contacts positioned very well either.

I found I had to "tweak" them a bit for them to line up properly with the contacts inside the holders.
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Old 04-14-2012, 10:46:15 PM   #7
Z28 Mark
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Quote:
Originally Posted by Twisted_Metal
Clean the contacts on the bulb holders with a tiny file.
The ones inside the holder and the contacts which touch the printed circuit panel.

I test the LEDs in the cluster with a 12V trickle charger before I install the cluster in the dash. It makes this job easier.

Good luck!
Try an eraser for a “typewriter” (white- slightly aggressive eraser) as it might be a little easier to clean up- This is how we were taught to clean PC board fingers (gold contacts) in Tech School.
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