LED Lights / Indicators setup

First steps:

Note

TLDR: First change the settings, then install the LEDs.

If you install LED lights - be it headlights, tail lights, indicators, etc., there is a high chance that you will get one of the following:

Do it BEFORE installing LEDs:

connect to your vehicle with JScan
go to Adaptations section
find LED Light settings or a similarly called group, OR, use the search (the green icon with a magnifying glass) and search for LED
identify settings called “LED <type of light> present ON/OFF” and enable it for every LED light you have

Note

If there is no setting for a given type (i.e. no LED Fog Lights for Wrangler JK) it means the vehicle software is not designed to accomodate for LED lights of a given type. You’ll have to install resistors (a.k.a. “anti-flicker harness”) or a CAN-compatible LED bulb.

Next, check the following options:

search for adaptations with the word “diagnostic” or “DTC” and disable to disable the persistent trouble code (only in newer vehciles)
for LED DRLs find an adaptation with the word “voltage” and ensure you set the DRL / LED headlamp volatage to 12-14V (most LEDs will not work at all on lower voltage settings and it’s not possible to adjust LED brightness with a lower voltage - this trick works only with traditional bulbs)

If the following steps didn’t solve the problem of:

flickering: locate the HID (HIgh Intensity Discharge) Headlights Present, Quad Headlamp Present, and or Bi-Xenon Headlamp present and try if enabling any one or any combination of them eliminates the flickering. If not, you’ll need a harness or better quality headlamps
turn signal (blinker, indicator) hyperflash: ensure you changed the LED Present settings AND disabled diagnostics prior to installing the LEDs. If not, install the original lights again, clear any errors, and repeat the process.