I haven't even tackled the wiring on mine. I hate to even look. I have one wire in the engine bay that has a red wire nut on it. Really, a wire nut?
Then when I was messing with the bumper the other day I had wires just hanging down from the left tail light. Opened up the tail light and they didn't even splice them. Just stripped a little section off the factory wire, and coiled the new one around it, and taped it up. So I can only imagine what the rest of the truck looks like. I know I have wires just hanging down from under the dash. All I can think is I'm pretty sure that needs to go to something, but the truck seems to run fine so I can tackle it another day!