I'm unclear on where this diode is located in the car. The TSB says under the lower crash pad. Is this in the trunk, under the dash, under the hood etc.? Anyone know? I tried Google, which leads me to a Hyundai Veloster page, which looks to be under the driver side dash, but it's unclear.....
EDIT - OK, I found that the diode was basically located in the left side of the foot well on the driver side. The diode holder is tiny (so is the part) and this is secured with yellow electric tape around a larger covered wire. Use a tiny flat head screw driver to lift the tab and pop out the diode, then press and click the new part in. 5 minutes.
My lights now work. This shows how bad ass the forum is

Glad to avoid the dealer for such a small and easy fix.