trailer wiring harness question

[JohnArnold]

My 2005 didn't come with the tow package so I added the trailer tow wiring harness. Everything went smoothly except there is a blue wire that comes through the firewall under the dash and I don't know what to hook it up to. I have a Prodigy controller with the pre-made wiring that clips into the dodge 4-wire connector (done). The dodge side of the 4-wire connector has 4 wires going into it, so what is this blue wire from the tow package harness for?



Thanks,



John

 

[Bob4x4]

The blue wire is the trailer brake actuating circuit,connect it to your brake controller.



Bob