Led lights glowing when switch is off

[Sunset beast]

Well I have this issue with my 2016 DX3 which can be on any 12V led light system on a motorhome or TT well occasionally I have 1, 2 or 3 of my overhead led lights glowing on with the power off, so I search the web and got 5 things that could cure the problem but I’m wondering if B.C. or the Dynamax engineer might have a cure other than these 5 things and why would cause this now.
Solution 1: Replace the bulb.
Solution 2: Set up the earthed wiring or Zener diodes.
Solution 3: Use a CFL to seep the extra voltage away.
Solution 4: Make use of a Neon Indicator.
Solution 5: Talk to the manufacturer of the LED lamp.

I’m not planning to replace the light since they work it’s just unusually that this started now.

 

[bclemens]

Not sure we have anything more to add...my LED bulb at my house glows as well. So it does not look like it is unique to 12V RV's.

Replace is the easiest. I would do that at home, but it doesn't really bother me enough to get the ladder.

 

[DavidMort]

How long does it glow?

LEDs will glow when shut off due to the phosphors used to convert the native blue emission of the LED to white light. If they are glowing for a few minutes and fade away then it could just be the type of phosphors they use. Some phosphors have very long decay times. If your room is really dark and your eyes are dark adapted you can see this phosphorescence with some bulbs for a very long time.

If it is longer then it goes to an electrical issue that there is charge still flowing to the LED.

 

[TheWolfPaq82]

MOISTURE. You should see my Xmas lights. If it rained or wet snow, I turn off my LED Xmas lights and my house still has a dim glow to it. Only way to stop that is to completely remove power from them. Moisture would make the LED strip under the awning of our 2018 Cherokee glow dimly if it had rained and high humidity.

 

[Scrapper]

The glow could be caused by the negative or neutral wire being switched instead of the hot or positive wire.

 

[Sunset beast]

Thanks for some of your ideas, the 2 light were glowing for maybe an hour one was glowing just for a couple minutes I hadn’t checked after that had Father’s Day stuff, also I haven’t done any wiring changes or modifications to lead me to that path and I known I have no moisture in my ceiling. I do have a couple new lights like what’s in the beast I’ll change out and check these out the old light and see if they glowing and check for some stray voltage I might even turn all power off if they continue and if they’re still on after that then???
Thanks,
David

 

[JLeising]

The glow could be caused by the negative or neutral wire being switched instead of the hot or positive wire.

This.
Also, a combination dimmer/on-off switch might use an IC to stop current - and might allow a small “leakage current” through to the LED when “off”. If the power wire is completely interrupted the LED will go out. Also true on the neutral/ground side - if completely interrupted, the LED will go out.

 

[Sunset beast]

Well this what I have so far...13.05V power to switch and 8.11V on the power from switch to the lights that’s with all the wires off the switch, seam like the wires in the ceiling lights are the culprit so will start pull some wire.
B.C. any chance on a 12V diagram it appears the circuit controls the outside bathroom lights and the kitchen Max Air fan.

 

[Magnatudes]

Are you hardwired or do you have one of those programmable I/O gizmos? Can make a difference.

 

[Larry-NC]

Exactly!

How long does it glow?

LEDs will glow when shut off due to the phosphors used to convert the native blue emission of the LED to white light. If they are glowing for a few minutes and fade away then it could just be the type of phosphors they use. Some phosphors have very long decay times. If your room is really dark and your eyes are dark adapted you can see this phosphorescence with some bulbs for a very long time.

If it is longer then it goes to an electrical issue that there is charge still flowing to the LED.

Exactly! The best way to satisfy yourself that this is the case is to run the LED for a little while and then disconnect the wire going to it so you know there is absolutely no current passing through it. Do not look at it as you disconnect it, so your eyes remain dark-adapted.

It's perfectly normal, and it is not consuming current from your battery.

Incidentally, these LED phosphors differ from the ones in a CRT display. CRT phosphors have a very fast decay so there's no motion blur in fast action scenes.

 

[Sunset beast]

Well I found the issue it was a 12 pin connector in the rear end wasn’t seal or foamed in but it was full of water when I took it apart and 2 pins corroded; thanks to my service guy he pointed me in the right direction also he says it common occurrence once the coach gets a little older. on my 2016 DX3 has it located around the propane tank and newer than mine they’re located above the hitch foamed in which is also as bad. So the corroded pins were give me a phantom ground that’s what my one picture with 8.11V no phosphorus burning. Thanks all for the information I hope this helps someone else that might have this issue.

 

[Scrapper]

Another cause of glowing led's can be other powered wires running next to the led's wires. Kinda like crosstalk in improperly shielded high speed communication cables.

 

[Davenport-FRF]

I just read your thread and replies. I had the same problem on our 2016 DX3. I have been searching for two days and after I read your thread, I went to the rear and found the 12 pin connector next to the propane tank just where you said, sure enough it was corroded and one pin was broken from corrosion. This connector was causing DC voltage 2 ground wires on the the ground lug located on the chassis frame behind the propane tank. Also found a third ground wire on the ground lug and after tracing it back it went to the safety solenoid for propane. Solenoid had either shorted internally or wired backwards! I am letting the dealership fix that problem because they relace that solenoid just a few months ago.
Hope this helps someone else in the future..