Brake controller and surge brakes...

[dingbat]

Re: Brake controller and surge brakes...

White is ground
Brown is tail markers
Yellow is left turn
Green is right turn
Orange is back-up lights (when in reverse, it will activate the solenoid on the trailer, disabling your brakes.)

They don't use an orange wire in a trailer harness.

http://www.etrailer.com/faq-wiring.aspx