I have an 08 2500heavy duty, I got pretty stuck 2 weeks ago and broke off a wiring harness that I have no idea what it belongs to. It is directly behind the front passenger tire. any help on what this is for would be great.

 

Without a picture, cant help at all. Sounds like an ABS sensor wire though. Without the truck in front of me, I'm only guessing. Any indicator lights on?