Quote Originally Posted by snowbird View Post
I don't remember exactly wich is what but they are named: left flasher, right flasher, parking and GROUND.
White: Ground
Brown: Park/Brake
Yellow: Left Turn
Green: Right Turn

The problem with some/most small trailers is they use the fenders/steel for ground, and at your tongue the white/ground is only 12" long. I always run my grounds directly to the light to prevent rusting/dielectric issues.

Trailer diagram