A flickering LED bar can be annoying for yourself and others. This article will show you how to fix it.By Jared Hammond – November 23, 2015

This article applies to the Jeep Wrangler JK (2007-Present).

So, you’ve just installed a new LED bar to the front of your Jeep Wrangler JK and you’re happy with the result until you notice that sometimes the LED bar flickers. This can be caused by either a problem with the installation or just some issue with the Jeeps computer. Going through the steps below should help narrow things down.

Material Needed

  • Soldering iron and solder
  • Capacitor
  • AEV ProCal tool

Step 1 – Check the wiring and plugs

In many cases a flickering LED bar is the result of an error in installation. The first place to check is the wiring. The best circuit to tap into when wiring an LED bar would be the cigarette lighter circuit, since this is only on when the Jeep is on and it receives more than enough power for LED lights. After that, it would also be smart to have it wired to a switch which is connected to the battery along with an inline fuse. Tapping into the headlight circuit can sometimes result in unexpected behavior like a flickering light. In addition, you should also check the LED bar itself and make sure it’s plugged in correctly.

If you are satisfied with the wiring, move on to Step 2.

Step 2 – Install an anti-flicker capacitor

Flickering lights is fairly common for LED headlights, and so your LED light bar may be suffering from a similar problem. What happens is that the computer gets confused from the decreased voltage and believes that the headlight is malfunctioning, resulting in the flickering. Installing an anti-flicker capacitor to the wiring will store up electricity and prevent this from happening.

Figure 1. Anti-flicker capacitor.

If the anti-flicker doesn’t work, proceed to Step 3.

Step 3 – Use an AEV ProCal to reprogram your lights

The AEV ProCal is a powerful programming tool for Wrangler owners. It can reprogram how your Jeep handles lights. This is mostly going to be useful if you have flickering problems when the LED bar is used along with other lights, such as daytime running lights. You can switch the daytime running lights to operate from either the fog lights or the turn signal lights instead of the headlights. You can also use it to switch off daytime running lights completely. Experimenting with the options may help you to find a optimal configuration for your LED bar to operate on.

Figure 2. AEV ProCal.

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