JW Speaker Fog Lights flickering - JeepForum.com
 
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post #1 of 7 Old 07-26-2021, 10:26 PM Thread Starter
minimodes89
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JW Speaker Fog Lights flickering

I have a 2017 JKU with JW speaker fog lights which are about 3 years old. Tonight I noticed they were starting to flicker. They only flicker when the engine is running, not if the key is in accessory. Passenger side flickers slightly more but both lights will also flicker together. Heated Trucklites headlights are not flickering. Would this be an issue with the lights themselves or something else?


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post #2 of 7 Old 07-26-2021, 10:39 PM Thread Starter
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They are the J1 version of the fog lights if I remember correctly.

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post #3 of 7 Old 07-27-2021, 05:07 AM
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If they are LED lights, maybe the anti-flicker part of its circuit is failing.


I say this because the lights get pulse width modulated power when the engine is running, and pure DC when the engine is off.

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post #4 of 7 Old 07-27-2021, 05:23 AM
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Quote:
Originally Posted by ronjenx View Post
If they are LED lights, maybe the anti-flicker part of its circuit is failing.


I say this because the lights get pulse width modulated power when the engine is running, and pure DC when the engine is off.
I don't know the tech on these particular lights, but I think they would only flicker together if they share a common controller, but not if they have the regulator built in.

One thing I would try, if the OP does not have an oscilloscope, is to go to Pep Boys and by a cheap LED marker light. Tap into the power line and see if that flickers as well. This could possibly be a bad wiring connection or relay which gets disturbed by the engine vibration.

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post #5 of 7 Old 07-27-2021, 08:31 AM Thread Starter
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Quote:
Originally Posted by ronjenx View Post
If they are LED lights, maybe the anti-flicker part of its circuit is failing.


I say this because the lights get pulse width modulated power when the engine is running, and pure DC when the engine is off.
I thought about it being anti-flicker going out, but seemed unlikely both lights would failing a the same time.

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post #6 of 7 Old 08-16-2021, 12:17 PM
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I had issues with multiple sets of LED Headlights flickering. The issues stopped when I replaced the headlight connectors on the main wiring harness. I bought the new parts at the local jeep dealership, and put them on in about 15 mins. Haven't had a problem since.

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post #7 of 7 Old 08-17-2021, 01:29 PM
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If you want to eliminate the PWM power completely use a rally harness or relay box connected directly to the battery. Either way the factory PWM signal is used to trigger the hi/low light relays. If you decide to build your own you will need a capacitor parallel to each relay coil to prevent it from flickering.

I have used both anti flicker and rally harnesses. The rally harness is by far the way to go.
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