Troubleshooting Installation of Trailer Wiring Harness on 2012 Nissan Frontier

Question:

Hi, have a 2012 Nissan frontier 4x4 with Curt C65225. I installed it per instructions and wont work, There is no voltage to any of the 3 pins. already triple check all connections. do you have the complete wiring diagram so i can start troubleshooting.???

asked by: Juan

Expert Reply:

If you have the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C65225 then you will want to check the connection points at the 10-pin connector as well as at the connection for the 4-way. Make sure there aren't any bent pins and use some dielectric grease # 11755 to protect the connections.

The wiring diagram you are seeking would only be available through Nissan, so unfortunately I can't give you that, but the connections are the first thing to check when troubleshooting. Next, I recommend replacing the relays # C57000. A bad relay is the next most likely option. The brown relay is the running lights and the blue relays are the stop and turn functions, one for driver's side and one for passenger side.

I've attached a video of this installation on a 2012 Frontier to assist.

expert reply by: Jason S