What is the Wiring Diagram for a 7 Way Plug on 2005 Nissan Frontier

Updated 01/27/2021 | Published 01/24/2021

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Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

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Hook Probe Circuit Tester

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Question:

Can you send me a pic of which factory trailer wire colours connect to an aftermarket harness 7 pin Vehicle is 05 Nissan Frontier 4x4 nismo model

asked by: James

Expert Reply:

I'll start off by saying that factory wire coloring does not always correspond to what is typically used on wiring harnesses, so you'll want to test each wire to make sure that it has the proper function that corresponds to the color using a circuit tester like the # PTW2993.

The color code for wiring harnesses varies between industries. In particular, SAE (Society of Automotive Engineers) standard wiring differs from the RV industry's standard wiring. The standard for both is as follows:

SAE Standard
Green: Right turn/brake light
Yellow: Left turn/brake light
Brown: Tail/running lights
White: Ground wire
Blue: Brake controller output
Black: Battery hot lead
Purple: Reverse lights

RV Standard
Green: Tail/running lights
Yellow: Reverse Lights
Brown: Right turn/brake light
White: Ground wire
Blue: Brake controller output
Black: Battery hot lead
Red: Left turn/brake light

I've also linked a photo that illustrates how 7 way plugs on vehicles and trailers will be wired, as well as some photos that you requested.