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Old 11-30-2013, 07:31 PM   #1
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Trucklite flicker

I installed the trucklite LED headlights WITH their anti flicker harness a couple of weeks ago. The lights work great, and have no flicker on high or low beam. I did notice, when the headlights operate in daytime running light mode, they flicker quite a bit. It's actually closer to blinking on and off. This completely stops when the headlights are turned on, but restarts when switched back to DRL mode. Has anyone else experienced this? I'm assuming it's because the lights operate at reduced voltage during DRL mode. I'm in Canada, so we have to have daytime running lights on, but I'd be ok with operating the low beams on instead of the DRLs. Can the DRL feature be altered with a procal or similar device?
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Old 12-01-2013, 12:04 AM   #2
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sounds like those lights and the dimmer control aren't compatible. There are 2 types of drl dimmers on led, pwm and linear/cc. go bakc to the store and ask if they have both types, maybe you were given the wrong one. Or maybe they changed a supplier at some point and now have incompatible products. Another option is to just remove the controller and wire the lights in directly and manually control them so they're full on or off, without a dimmed drl level in-between.

You can wire it similarly yourself with 2 relays. one relay comes on with ignition and powers lights for drl, and a second relay connected to the first to cut power to the first when highs come on, which is how they should work to remain 100% street legal.

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Old 12-01-2013, 04:15 PM   #3
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Originally Posted by gecko4 View Post
I installed the trucklite LED headlights WITH their anti flicker harness a couple of weeks ago. The lights work great, and have no flicker on high or low beam. I did notice, when the headlights operate in daytime running light mode, they flicker quite a bit. It's actually closer to blinking on and off. This completely stops when the headlights are turned on, but restarts when switched back to DRL mode. Has anyone else experienced this? I'm assuming it's because the lights operate at reduced voltage during DRL mode. I'm in Canada, so we have to have daytime running lights on, but I'd be ok with operating the low beams on instead of the DRLs. Can the DRL feature be altered with a procal or similar device?
I can't believe I didn't give you a heads up on this. Get the procal and program the drl to anything other than hi or lo beams. I started out with fog drls but switched to signals a few weeks later. The truck lites don't like the 6 volt output from the drl mode. That's why the flicker goes away at full voltage. You won't have any issues with fogs or signals as drls.
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Old 12-01-2013, 04:18 PM   #4
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I can't believe I didn't give you a heads up on this. Get the procal and program the drl to anything other than hi or lo beams. I started out with fog drls but switched to signals a few weeks later. The truck lites don't like the 6 volt output from the drl mode. That's why the flicker goes away at full voltage. You won't have any issues with fogs or signals as drls.
+2, I use my fogs with the TruckLites.
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Old 12-01-2013, 04:30 PM   #5
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I can't believe I didn't give you a heads up on this. Get the procal and program the drl to anything other than hi or lo beams. I started out with fog drls but switched to signals a few weeks later. The truck lites don't like the 6 volt output from the drl mode. That's why the flicker goes away at full voltage. You won't have any issues with fogs or signals as drls.
Thanks, I figured there must be a workaround somehow. It sure is nice to be able to see at night now. Those oem lights are really a pos. lol
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Old 12-01-2013, 08:21 PM   #6
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Thanks, I figured there must be a workaround somehow. It sure is nice to be able to see at night now. Those oem lights are really a pos. lol
Hell ya!
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Old 01-06-2014, 08:14 PM   #7
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I've got random flicker problems with my Trucklites. I'm running them in my 13 JKU with the anti-flicker harnesses. I've noticed if I move the wiring around, the flicker goes away. However, I just started having a problem with the passenger side, mainly when I turn the brights on.

Do I have a wiring issue or is it the anti-flicker harnesses that might be bad?

I bought them from someone else who neglected to mention any of these issues.
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Old 01-06-2014, 08:49 PM   #8
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Swap the anti flicker harness from side to side. If the problem follows the harness, that's what you have to replace.
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Old 01-07-2014, 02:04 AM   #9
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Swap the anti flicker harness from side to side. If the problem follows the harness, that's what you have to replace.
although that's a good idea, both sides are causing me problems.

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