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Old 08-21-2013, 03:33 PM   #1
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Need some assistance from you electrical gurus...

I have Truck-Lites. They Flicker. I don't want them to flicker. What size capacitor or in-line doodad can be used to make the flickering stop? I refuse to shell out the ridiculous amount of money they are asking for what I'm asking for. I see it as a product defect and it should be made right by the company, but since that ain't happening...I'm going my own way with it. Yeah, I'm a little upset with this whole issue. Thanks!
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Old 08-21-2013, 03:46 PM   #2
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Old 08-21-2013, 04:27 PM   #3
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Do ALL your lights flicker... or just these?????

The "in line doo dad" you are referring to is probably "correct wiring"..........
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Old 08-21-2013, 05:26 PM   #4
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the flicker is caused by pulse-width modulation in the jeep's electrical lighting circuit. this is more noticeable when you change your lights to higher powered ones or brighter ones... or any other light other than a low powered halogen stock bulb. what is basically happening is the voltage on the lighting circuit is fluctuating from anywhere between 7 to 14 volts dc.

the right fix for this is done by either:

1 - purchasing a relay type harness with the proper relays (one for high beams, one for low beams), 2 electrolytic capacitors of at least 220 micro farads in capacitance... wired in parallel of terminals 85 and 86 of each relay (this prevents the relays from chattering and keeps them engaged even if the power drops low for a short moment), diodes of at least 3amps/50volts (to prevent any trace power being sent back to the jeep's pcm/fuse panel the wrong way), and proper gauge wiring and fuses run to the battery to power the new lighting with a steady 12+ volts dc.

OR

2 - making your own harness with the above parts.

these kits are sold pre-made from a few different companies on the web. i purchased some parts from ray at rallylights.com and did everything myself. if you are unfamiliar with electrical wiring, or soldering, or reading an electrical diagram, i would highly recommend buying a pre-made harness.

some people will tell you the diodes and capacitors are not necessary and to just run a few relays fuses and wiring, however, i feel they are a step overlooked by people not understanding electrical circuits in new vehicles where everything is monitored by a central brain or computer unit.

hopefully this helps... feel free to message me with any questions.
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Old 08-21-2013, 09:17 PM   #5
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7ekken, thanks for the write up. Followup question, what would cause power to flow back requiring the diodes? The capacitors discharging?
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Old 08-21-2013, 09:40 PM   #6
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Old 08-21-2013, 10:53 PM   #7
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Thanks for the specifics! I was originally going to build the harness, then found out Truck-Lite was introducing the adapters. I'm really not keen on the price, especially considering how much the headlights themselves were. I don't have a huge amount of disposable income, but I felt these lights were a necessity given the amount of night driving I do and where I live. I originally read that the flickering only occurred on vehicles with Daytime Running Lights, but since I don't have DRL's and I still get flickering, I'm a little miffed. The flickering will no doubt shorten the life of these lamps. I think that Truck-Lite ought to recall the lights and build the proper circuitry into the lamp assembly. That's just my .02, anyway.
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Old 08-22-2013, 07:35 PM   #8
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Its not a problem with the lights, its the way Jeep designed the newer headlights to work. Pony up for the adapters , build your own, or deal with the flickering. Tons of info about it, so should have been no surprise.

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