If yours is the same as my 2001, there is a prewired controller plug-in under the dash.(I think this is the one you are talking about) The only thing is, it's a Chrysler's own set-up. Dodge sells these adapter plugs that you can splice in to your controller, and then just plugs in to the existing truck plug. But in keeping up with typical Chyrsler ways, it's about 70 bucks! For a plug-in and wires about 6 inches long! That was too much for mee, so I bought $2, flat four wire trailer plug, cut the under dash connector off, spliced in the trailer plug, and tahdah! It works just fine. (I did steal the wiring codes from the dealer when I was looking at their expensive wiring harness though) Hope this helps.