Sorry about the sigh ing but yes i did look. Both manuals. I did find this but i dont understand how to read it. As i said i dont see what colors the wires are or what they go to. To me it looks like white/yellow control everything. Idk but i dont see anywhere about a red wire or where it goes. Sorry for my lack of knowledge but im trying here. I wish it was as easy as car stereo wiring. LOL Thanx for any help tho. Its appreciated.
Hey bro it's all good. The newer truck manuals get all the fancy color-coded diagrams but us 3rd gen guys have to work with what we got.
So what Lonestar pointed to in his picture is the color code for the wires. I can tell you what each of those codes mean to help you track down your issue.
So this is a screenshot of my 2006 manual for the rear lights, which is probably a tad different but hopefully similar. I'm not sure if you'll find anything I say particularly useful, but if not someone else might come along later and find it useful so who cares
First off, you're right in saying that white and yellow control everything back there, which is kinda odd having all these wires be the same color lol. The thing in red tells you info about the wires and is probably the most useful for your case. The 20 stands for the gauge of wire, and the first row (circuit number) is just useful if you wanna track the same circuit over multiple pages in the manual, which I don't think you'll need to.
Just to be sure, do you still have your old tail lights or bulbs? If this just started occurring after you swapped to LEDs, maybe one of those bulbs just started malfunctioning. You could swap in some standard bulbs back in and see if that solves the issue