Trailer Brakes ???

[Skinny Blinky]

On my new 03 , there is no wire for the trailer brake controler. There was a paper supplement stating something about your headlight switch interuppting with your brakes???

[dmaxalliTech]

03 dont have it, dont know why, has to be purchased from dealer, dont know part no. it in the accesories catalog, Dont forget to pull the dummy j-case fuse inunder under hood block and install a 30 amper. that will power you aux for your trailer, charge batteries etc.

[Max Power]

You can also buy a jobber one at most autoparts store. One I know of is made by hoppy: http://www.hopkinsmfg.com/37785.html

[Onebigcanuck]

On the 2003's they changed the location of 2 wires in the underdash plug in. You can use a trailer harness from a 2002 or 2001 by changing the locations of the 2 wires. If you do a search on htis forum you will find which wires to exchange. It works cause I wired my new 2003 3500 with the old harness.

[letsgo]

This is what I copied from a previouse posting, interchange 2 wires, that are located on terminal "A" and terminal "D".
hope that is some help????

good luck