Anyone got the wiring diagram for rear lights/trailer wires?

[Ibanez GSA60]

I want to wire up my truck to be able to handle a 7-pin trailer, and am wondering if anyone has the diagram for the harness

 

[Bob L]

Tailamp wire is brown,black is ground, yellow is left turn,dark green rt turn lt green backup

http://typhoonland.com/wp-content/u...r-Bargman-Plug-7-Pin-Trailer-Wire-Diagram.png

 

[88GMCtruck]

Here is what is at the back of your truck, usually up behind the bumper attached to the bed, near the spare tire. It'll be a bundle of wires taped/tied together.

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