This mod takes a long time and requires a lot of patience Dino. I completed one door this weekend, and its working fine. I started with these from ebay. Fit Kia Optima 2011 2014 Door Handle Assy with Lamp for Smart Key 2P 1set | eBayWell for starter have a **** load of patience Jason and don't be like me ripping out wires because I was impatience lol, what do you mean by pre-wire door handles? Do you have something you can share with us so we have an idea of what you're doing? I gave up halfway so that's why I asked lol.
As for power, you can grab any 12v source on the door and for ground, you have to run the wire through the door jam and tag a wire in the harness above the gas pedal. You don't have to go all the way to the dome lights. Good luck. I have lots of pictures if you need.
---------- Post added at 05:34 PM ---------- Previous post was at 05:31 PM ----------
How's the Infinity working out for you buddy? Before I got my current rims, I was looking hard at some Infinity factory rims for my Optima! hahaThis was the only mod that defeated me. I found the right connections in the map light unit, I even drilled a hole in my door wire connector thingy, but I *could* *not* route the wires. I had the entire fuse box dropped out, and still couldn't get my fingers to fit in there.
So, I did the Infiniti Q50 mod instead.