Trailer wiring problem

[JoeDunlap]

Hi all,
Im installing a hitch and trying to get the wiring sorted out. I purchased an adapter and located the prewired plug under the vehicle, but there seems to be no power available at any of the pins. The adapter kit stated that I needed to add a 20 amp fuse in the slot marked "Towing" in the fuse box under the hood. I did, and have power on both sides of the fuse, but nothing at the rear plug. Does anyone have a wiring diagram showing where the connections to the plug under the car connect to the lighting circuits?

Thanks
Joe