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Old 07-20-2015, 11:20 PM   #1
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Odd LED light issue -Help

I have a 65 Caravel with the original light fixtures. I have replaced the original Univolt converter with a modern power converter. The issue I am having is with the LED lights I purchased to replace the incandescent 1141 bulbs. These LEDs work in all but two fixtures.

One is the double reading light over the street-side bed, one works the other does not.

The others fixture is the 4 bulb light over the galley.

All of the LED bulbs are functioning and work in all the other fixtures. Also the incandescent bulbs work fine in the two problematic fixtures.

Any ideas on what the problem may be?

Any help is appreciated.



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Old 07-20-2015, 11:38 PM   #2
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Could be polarity in the sockets. Some LEDs are polarity sensitive, incandescent aren't, so if the non working sockets are wired backwards it can keep the LEDs from working.
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Old 07-21-2015, 07:52 AM   #3
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Some of the light fixtures on our 63 Safari had two bulbs in each, a 120vAC and a 12vDC.

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Old 07-21-2015, 07:09 PM   #4
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Originally Posted by HiJoeSilver View Post
Could be polarity in the sockets. Some LEDs are polarity sensitive, incandescent aren't, so if the non working sockets are wired backwards it can keep the LEDs from working.

Thanks. That may be it. Do you know the correct polarity for those single contact sockets? Is the bayonet (-) or (+)
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Old 07-21-2015, 07:29 PM   #5
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Fuse?
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Old 07-21-2015, 07:35 PM   #6
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Thanks. That may be it. Do you know the correct polarity for those single contact sockets? Is the bayonet (-) or (+)
The center post is positive, the housing is negative. Multimeter will show negative voltage if wired backward. Just make sure you have the leads straight(+&-). May want to check as mentioned some early trailers had a mix of 12v and 120v lights, but if 12v bulbs worked in them they should be 12v otherwise would have blown instantly.
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Old 07-21-2015, 10:18 PM   #7
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Thanks. It's all 12v. Only plugs are 120v in the Caravel.
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Old 07-22-2015, 02:16 PM   #8
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Have you swapped the non-working LED's into other fixtures? maybe the LED's themselves are bad?
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Old 07-22-2015, 02:29 PM   #9
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When I had the same problem it turned out to be the circuit breaker...open the box and look at the small buttons off to the side of the bus bar. I didn't know they even there!
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Old 07-22-2015, 11:46 PM   #10
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Have you swapped the non-working LED's into other fixtures? maybe the LED's themselves are bad?
It's most likely bad LED units or incorrect polarity. In our 28' International, I swapped out all of the halogens for LED's and had problems with two different light fixtures. In one case, the leads on one LED "bulb" were first backwards and inverting the bulb took care of it, but ultimately one if the heads was slightly misaligned and after inconsistent performance, I trashed it and replaced it. No problems for three years now. The other is a 20 LED bathroom fixture and one LED flickers annoyingly and intermittently. I will replace that one soon, too.

As the other party suggested, have you been able to get a different LED to work in the socket in question? And have you tried turning it 180 and reinserting to check polarity?
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Old 07-25-2015, 12:48 PM   #11
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polarity

If HiJoeSilver is right, and I think he is, all you need to do is take down the fixture and switch the two wires. That will change the polarity.
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