I recently got in a small accident and broke my passenger side mirror. My truck did not come with puddle lights in the mirrors. If I buy mirrors with puddle lights is the wiring already in the harness that mirrors plug into or would I have to run wiring for that?

 

I'm not sure about your 12 but on my 13 the wires were there. I also gain heated mirrors, which had wiring too, but I had to change the hvac contol panel to activate it.

 

Do you know how many wires where coming from your mirror? I had 6 total. With signal, heat, and adjust. My harness it plugs into has 8 wires going into it.