Info below was posted by Charlie Burke many years ago Airstream is
the color from the factory cord "industry is the color on the
standard plug used today.
Trailer wiring info
Airstream's from 1966 through 1981 were not wired to the industry
standard. They knew better, right? Here's a little conversion table to
help sort it out.
Airstream Function Industry
Red Left turn/stop Red
Green Tailight/clearance Green
Brown Right turn/stop Brown
Blue Charge line Black
White Ground White
Black Backup lights Yellow
Yellow Brakes Blue
Rick Davis 1602