7 Pole Trailer Wiring Color Code. I have looked at what's left of the wiring harness on the back side by the connector and have determined the following colors to exist: yellow blue black red brown light green dark green. A colour coded trailer plug wiring guide to help you require your plugs and sockets.
I looked all over TW and Google trying to find out which colored wires performed which function. Or why not make your DIY installation easier with our 'Plug and Play' solutions. It is Weather Proof to keep out the elements and includes extra wire grommets for tight seals.
They should be pretty robust if used in the trucking industry.
Wiring for AC and DC power distribution branch circuits are color coded for identification of individual wires.
A colour coded trailer plug wiring guide to help you require your plugs and sockets. In some jurisdictions all wire colors are specified in The older color codes in the table reflect the previous style which did not account for proper phase rotation. The existing wiring harness has partially melted due to a car that caught fire behind me in a parking garage.