I wanted to document my process here, in case it's helpful to anyone else. I am a complete novice when it comes to electrical wires, so hopefully my layman descriptions are helpful.
I have a 2015 Genesis 5.0. I have previously replaced half a dozen turn signal bulbs over the course of ownership (~1.5 years to date). It got to the point where I could take out the engine cover, crossbar, and air box in next to no time because of all the practice. I had tried to plug-and-play LED bulbs early in the process (Sirius LED that others have mentioned), but they simply would not work correctly - not lighting up, hyperflashing, etc.
When I finally decided to bite the bullet and do the work to MAKE the LEDs work, here's what I had to do:
1) Order a spare light bulb terminal in case I screwed up:
Spare part link
2) Plug-and-play LED in the passenger side. This side had the correct polarity for the LED to work, but would hyperflash
2a) Install a resistor on the passenger side. See the Step 1 diagram on this
website instructions
2b) Tape the resistor far away from any other wires. Resistors get HOT!
2c) I happened to use a basic 6 Ohm resistor:
Resistor example link
3) The LED would not light up at all on the driver's side. I confirmed with a multimeter that the polarity was reversed compared to the passenger side
3a) Cut both wires for this terminal, and then reverse them to splice back together
3b) I screwed up 3 different ways when doing this step, so what I ended up doing was replacing it with the new terminal from Step 1 instead
3c) There are multiple ways to connect wires together. I happened to use this:
Wire connector link
3d) Note that there was no hyperflashing for the driver's side, so I did not need to install a resistor
Finally, a word of warning: I didn't do Step 2b correctly so the resistor melted the plastic it was resting against and is now stuck somewhere inside the headlight housing. I think this is OK since I don't plan to open this up ever again - assuming the LEDs last for the remainder of the duration I plan to keep this car.
Attached pic to show DRLs working as intended.
