[TheBurninator]

City lights come from the side marker lighting.

Those colors aren't factory colors on the new harness. When I put my e-codes in I just tested each wire until I got it right.

For the US wiring the brown is ground. W/BK is high beam and Y/BK is low beam.

 

[TheBurninator]

So it won't short anything out or do anything crazy if I just randomly test until I get it right?

Even if you do somehow short something out it will just blow the headlight fuse. You will be fine.