Stop and signal circuits?

[havoc88]

good afternoon,

I am attempting to put in a new wiring harness for towing. the trailer needs to be re-wired, so i bought a kit and the harness it can with is not the OEM harness aready on the van. The harness needs to be connected to the both the stop and turn signal circuits and the tail lamp circuit with snap lock connectors.
can anyone help find out where the stop and turn signal circuits are and how they look like? also the tail lamp circuit? please and thank you!

[Black Sunshine]

All of the circuits you need are within either of the tail lamps. Remove the tail light. Remove the bulbs from it and turn the various lights on that you need and you will see which wires are which.