Headlight Issue - JeepForum.com
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post #1 of 9 Old 09-06-2020, 09:29 PM Thread Starter
SolarFantom
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Headlight Issue

Alright guys, i’m coming here in desperate need of some help. So i have a 2010 Jeep wrangler sport. it has after market LED headlights, when you turn the headlights on they flicker and shut off. We thought it was the headlights, so we ordered factory replacement halogen headlights and they did the exact same thing, they ducker on and shut off. all the auxiliary lighting is working fine, blinkers, running lights, tail lights.
we bought a brand new TIPM, installed it, worked fine for 2 days, then they stopped working again. computer diagnosis says ground issue, my brother is a Level III dodge tech and he completely rewired the entire headlight wiring with all brand new wiring. worked for 1 day. now they aren’t working again. i have no idea what else to do, has anyone had this issue and can help me out? we order a new headlight control switch also. installing that once it comes in, but i have no idea what else to do. any help will be greatly appreciated.

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post #2 of 9 Old 09-06-2020, 11:41 PM
ravenworks
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You need the anti flicker module
Search that
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post #3 of 9 Old 09-07-2020, 01:04 AM Thread Starter
SolarFantom
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Quote:
Originally Posted by ravenworks View Post
You need the anti flicker module
Search that
It has the anti flicker installed.
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post #4 of 9 Old 09-08-2020, 11:47 AM
cranbiz
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Well, There are Anti flicker harnesses and then there are Anti Flicker harnesses.

However, if you actually went back to stock headlights and still had the issue, then who knows what the issue is.

If the grounds are good, then the PCM might be suspect. The headlights are Pulse Width Modulated voltage, which is why many aftermarket LED's flicker. The halogens actually flicker too but because of the lengthy decay a halogen bulb has, you never see it.

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post #5 of 9 Old 09-08-2020, 04:14 PM
ronjenx
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The headlights get pure dc when the ignition is off. If your headlights behave the same with the ignition on and off, it's not a pwm issue.

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post #6 of 9 Old 09-13-2020, 04:47 PM Thread Starter
SolarFantom
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Originally Posted by cranbiz View Post
Well, There are Anti flicker harnesses and then there are Anti Flicker harnesses.

However, if you actually went back to stock headlights and still had the issue, then who knows what the issue is.

If the grounds are good, then the PCM might be suspect. The headlights are Pulse Width Modulated voltage, which is why many aftermarket LED's flicker. The halogens actually flicker too but because of the lengthy decay a halogen bulb has, you never see it.
we’ve replaced everything except the PCM but the issue is, according to the diagnosis, it shows the PCM is functioning as it should, it’s getting the info it needs to turn them on. so it has to be a wiring issue somewhere, i just don’t have $2,000 to buy a whole new wiring harness just for it to not be the issue. we replaced all the wiring that goes to the lights themselves but that hasn’t fixed it. really don’t know what else to do. it sucks having a vehicle that you can’t drive at night and not being able to fix it because nobody knows what the issue is. we’ve had people look at it and not a single one can fix the problem. it can be fixed, just needs the right person that knows what to do.
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post #7 of 9 Old 09-13-2020, 04:49 PM Thread Starter
SolarFantom
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Originally Posted by ronjenx View Post
The headlights get pure dc when the ignition is off. If your headlights behave the same with the ignition on and off, it's not a pwm issue.
it does the same. sometimes they work and sometimes they don’t. it’ll work for a week straight then the next week they won’t, so i have no clue what else to do 😞 it’s a sentimental jeep so selling it is not an option
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post #8 of 9 Old 09-14-2020, 06:37 AM
cranbiz
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Have you gone thru and made sure ALL the grounds are good?

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post #9 of 9 Old 09-18-2020, 11:41 AM
Dale M.
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When they quit working did you check for voltage on the lighting leads on back of headlight... If not there trace back to any relays or switches or fuses or to output of PCM till you find it!

On my 2002 TJ the headlights are grounded to radiator core support, did you clean and tighten ground connections, does your core support have good ground connection to fenders and frame?

Wife was having a problem with one headlight on her HONDA... Turns out it was bad socket on real of headlight lamp... IT could be anything...

Probably biggest problem may be how you are trouble shooting it....

If you can get wiring diagrams for you year model it helps....

Dale

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