Hey guys, i meant to put up a how to in this section for anyone needing a trailer and wiring harness kit. All products purchased from www.etrailer.com I took delivery of the first ever NV 2500 in the US so im sure ive been the first to put a hitch on lol. NISSAN DID NOT PREWIRE THE NV's For trailer wiring so dont even bother looking around underneath for it. Hitch http://www.etrailer.com/Trailer-Hitch/Nissan/NV/2012/87610.html?vehicleid=2012305994 Wiring Harness (standard, you dont need one specific) http://www.etrailer.com/Wiring/Tow-Ready/119190.html 4pole to 7pole adapter (for tralers needing brakes) http://www.etrailer.com/p-V30606/Adapter-4-Pole-to-7-Pole-and-4-Pole-OEM-Style.html Go to lowes and purchase 14ga stranded wire to get power to the adapter from the battery and to extend the right tail turn signal over to the adapter. there is a braking harness to the left of you foot. You will need to run the wires from the to the three fly leads off the pole adapter. You will also need to get a trailer brake control unit! it really is simple. Since the van is open you can easily fish the wires around for a clean OEM look. The hardest part is getting the power wire to the battery. panels pull off really easy so you can route it down and around the cab. There was a slight void in the fire wall to push the wire through along side of the others. It took me a whole to find a good grounding point. DO NOT GROUND TO THE POWER INVERTER. that has its own isolated ground and you can ruin the system if your ground 12v. to it. 4-7 pole adapter works nice as it has its own little grounding wire that you must use. i just self taped into the frame and i have a near perfect ground. If you dont need the adapter and just need a 4 pole plug then extend the ground of the relay unit down and ground to the frame. I found the other grounding point within the van to have poor grounding so the lights would dim. to route the wires to the outside since i didnt want to drill a hole. Remove the bottom most rear luan panel on the drivers side and you will see plastic thing with a flap. I assume its for pressure equalization but gives you a perfect conduit to the outside bottom of your NV. you dont need a light tester. just remove the two screws on the side holding the light and you will see what wire goes to which light. use the supplied scotch lock connectors and tap the wires ON THE INSIDE OF THE VAN. if you do it behind the light it wont seat back into its slot. Good luck, its really easy and etrailer has a video showing how to do the wiring. i spent half a day total on my retrofit. You will need brute force, and a torque wrench for the hitch. That was the most difficult for me. I also am a clean freak so i used black plastic corrugated wire conduit to hide the wires and to make it look OEM. you dont have to do that though. You can find it at lowes 25 feet for 6 bucks! good luck, hope this helps!