Stupid Question - Need help finding wires

[HawkeyeRaptor1]

Hey guys, I will be attempting to add amber led's under the side and hood vents tomorrow morning, as shown by other threads. As this will be my first time doing any "mods" and I am a novice when it comes to electrical work, I want to make sure I have my ducks in a row before I starting splicing into wires. i would like to tie the led's into the parking/marker lights so that they will be on any time my parking lights are on. I also plan to try and tie the parking lights into the up fitter switches so that they will always be on when the truck is on and I can leave the headlights in auto. The question that i have is how can I identify the wires for the marker lights? In the thread that gave me the idea, they tied into the marker wires in each fender, but i am a visual guy. If i see it, i can do it. I have been searching google and both forums for the past hour and cannot find what i am looking for. Can anyone provide any assistance/directions on how to identify the correct wires and possibly a picture or diagram? i would greatly appreciate it!

I know the easy solution would be to tie them directly to the up fitter, but I have plans for the future and will need all 4 pass through wires for those mods.

Thanks in advance.

 

[J DAMAGE]

If you don't get pictures, just pull your head light out, you will see were the maker light is, and see were your wiring is gonna go straight to the side vent.
Best visual and hands on.