There is a Standard Wire Color Code...

[DesertTracker]

...and then there is Keystone. The plastic license plate mount tabs broke on my taillight so instead of replacing, I built a bracket on the rear bumper to re-mount the license. I used LED license plate bolt lights and decided to run the hot and ground back to the junction box. I opened the box, found the brown wire connection and cut, soldered and heat shrink'ed the two original wires and my new third wire and tied the ground to ground. When I applied power to Pin #1, the running lights were on but no license plate lights. I started probing with a meter and found the green wire coming in from the seven pin is running lights which is connected to a green wire going into the trailer. The pinout is correct, but the color code is NOT standard. I should have verified the pinout an color code first I guess, but who would have thought the color code would be wrong?? Lesson learned. I re-did my work to non-standard and now have license plate lights. Brown is right/turn stop on my trailer, except for the brown wire going back to my license plate lights soldered to the two green ones! So much for a standard.

[CA_Traveler]

There are no wiring color standards for a RV. There are some suggestions that may be followed. And they will not stop production while someone runs to the store for the correct color.

[CA_Traveler]

There are no wiring color standards for a RV. There are some suggestions that may be followed. And they will not stop production while someone runs to the store for the correct color.

[DesertTracker]

I took a second look at the etrailer.com site (below) where I got the original info and found out that is correct; cargo trailers are different than travel trailers and fifth wheels, and I used the cargo trailer guide. I guess there are multiple standards depending on the type of trailer. The top chart on e-trailer's site doesn't break it down by trailer type, just number of pins and color, but below there is a distinction between the two. As always, this site has the real information! Thanks for setting me right.




https://www.etrailer.com/faq-wiring.aspx

[Chris_Bryant]

Green was the standard running light color for many, many years. Lately people have tried to adapt the cargo trailer color code to the RV 7 way, which creates confusion.

I would always remember, when wiring a 4 way to a 7 way- green to brown, brown to green, yellow to red.

[lj2654]

Most of the wires on my Beaver DP are white, but each wire is labeled what it is for.....takes some good eyes, not mine to read some of them!

[crazyro]

That's good to know. I have a Keystone TT, so I appreciate you sharing this info.

[Mandalay_Parr]

Yes, on a RV it always pays to check first.
I don't trust any colored wires.