I'm installing a plug for a trailer and would like to confirm color code for taillights and turn signal/brake lights. Green for right, yellow for left, brown for taillights, white for ground. I also have a red, blue, and an orange wire. One would be for the backup lights. What are the other two for? Also where are wiring diagrams available?

 

Just type in ford trailer light cable set up.
Red is usually stop lamps , blue can be used for aux braking or charging a battery if there is one on the trailer

It can get a little confusing because it depends on what kind of trailer you are pulling.