Not a diagram, but better than nothing

[DQDick]

In my quest to wire my light correctly the first time I went serching on the web and found this: https://www.keystonerv.com/media/914...eystone-rv.pdf which will allow you to download the color code section for future use.

[BB_TX]

I remember seeing that before. It is dated 2015 and I seem to remember that was about the first time they released it. The Montana brochure about that time even mentioned the wire color coding as a “feature”. No idea how much earlier they actually started using it.