[Florida4x]

Instead you need the more complicated harness that has the relays in it. This is the factory method of adding trailer wiring
2006 Nissan Frontier Custom Fit Vehicle Wiring - Tekonsha

I just had trouble with the U-Haul installed spliced in 4 pin connection (wish I would have read about it before going that route first but that's a different story). I bought the 7 pin with relays from e-trailer and installed it in 15 mins no problem. Works like it's supposed to now, I would recommend going that route and being done with it.

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