7 Pin Trailer Wiring Colors. I have no idea which is the "standard" that will also match my Chevy. [rant on] So am I the only one that thinks there should be standard colors used for trailer wiring? A colour coded trailer plug wiring guide to help you require your plugs and sockets.
If you have a round connector, commiserations. Five-wire systems are the same as the four-wire system, right down to the wire color and The seven-wire system corresponds exactly to the six-wire systems plus one bonus pole that's generally. Plug has round brass pins to ensure minimum voltage drop and pull grips for easy insertion and removal.
Anyone have a diagram of which pins supply which functions?
Learn all about trailer wiring at HowStuffWorks.
If you look at the connector straight on from the rear. There is a trailer pig tail behind the passenger side rear tire. 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.