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dadztoy 04-10-2019 09:58 AM

CB Interference from EC LED headlights
So I was on a ride with a buddy a while back and noticed that my CB would not squelch... It took a squelch adjustment of 14 before it would quiet... Today I got a chance to troubleshoot it a bit and just playing a hunch, I pulled the 15 amp fuse for the low beams (LED's) and the CB quieted and the squelch was back to it's normal setting of 4...

I don't remember if there was a problem after the initial installation of the EC LED headlights and given the fact I only use the CB when riding with a buddy who visits once or twice a year perhaps I never noticed it... Still, I want it to work the way it should and did before the LED installation...

Has anyone else experienced this issue with excessive electrical noise from the EC LED headlights and if so what was the fix??? I will give Lewis a call when I get a chance but will be away for a day or two starting tomorrow...



AZgl1800 04-10-2019 10:53 AM

I was just talking to my son about the headlights on his 2006 Dodge pickup.

he told me that when he installed the LED type lights, that it caused his Bluetooth cellphone from connecting, and it also caused noise in the entertainment system in general.

He replace those 'brand new' LED lights with HID headlights, and the problem went away.

My '02 1800 has 35w HID low beams, and my CB squelch is also at about the '4' setting. might be a tad more, haven't used it in a year now.

DaveO430 04-10-2019 06:13 PM

You might see if you can get hold of EC, maybe they have a solution. I have the same headlights but don't have a CB. The original HIDs I put in 11 years ago caused no reception in the FM radio but updated ballasts cured that.

guyval 04-10-2019 07:09 PM

Sounds like you're getting rf interference.
Happens all the time even though it's not allowed according to the FCC.

Check out YouTube for rf chokes.
Many ways to tackle it, from very simple ferrite bead or ferrite choke, and many more.

What you're trying to prevent is the rf from coming in to the cb via it's antenna coax.
Or just by being too close to the RFI source.

Shielding the led by wrapping it or surrounding in into it's own cage if you will.

What you described is called front end over load.

The led has some components emitting RF. Read the label if you can for the led lights and see what the statement is about interference caused by that device.

It'll be some part of the FCC rules pertaining to interference.

Most of the time..... Devices are not allowed to emit RFI. At all!

But we all know that's not the case, in reality.

Good luck

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guyval 04-10-2019 07:18 PM

Dave0430 above had a great idea too

EC might send you some"quieter" bulbs.

Maybe yours are defective.

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dadztoy 04-10-2019 08:48 PM

Thanks guys... Being a HAM for over 50 years I am quite familiar with RFI, EMI, etc... I'll call Lewis at EC in a day r so to see if has any words of wisdom...


ka4yqi 04-10-2019 10:58 PM

What did you ever find out about the led?

guyval 04-10-2019 11:18 PM

And I typed ask that stuff for another ham


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dadztoy 04-11-2019 08:05 AM

Out of town on a little trip right now - will phone EC tomorrow and ask about solutions...

tamathumper 04-12-2019 06:16 AM

On a related note, I installed fancy new LED bulbs in my brandy new garage door openers last fall. Suddenly, I could open the doors, but they wouldn't close. Or after a while, I could close them, but not stop or re-open them.

Turns out, all the new-fangled garage door openers use wireless wall switches. The LED bulbs were putting out so much radio interference that the first button press would activate the door. And the light. Which now blocked any further button presses for a few minutes until the lights went out.

Back to Amazon, and found out there are "Garage Door Certified" LED lights you can buy, so that's what I did, and problem solved.

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