I'm trying to find out the colors of the trailer wiring on my 04 short box... There is a plug under the drivers floor board. I would like to tie in at that point. Does any one know where i could find the colors of the wires for the trailer harness behind the plug, not on the engine side of the plug.
Thanks for reading this guys..

 

There should be 2 connectors under there. C216 & C217.
Here's the pinouts for the trailer stuff.
C216 - pin 3 - Brown - Park Lamps, (7-way - pin 3).

C217 - pin 1 - Yellow - Left Turn, (7-way - pin 5).
C217 - pin 2 - Dark Green - Electric Brake Power, (7-way - pin 2).
C217 - pin 3 - Red/Violet - +12V power, (7-way - pin 4).
C217 - pin 7 - Blk/Org - Ground, (7-way - pin 1).
C217 - pin 12 - Wht/Lt Green - Backup Lamp, (7-way - pin 7).
C217 - pin 13 - Light Green - Right Turn, (7-way - pin 6).

 

PERFECT... Thanks so very much.. Now i can get back to hauling junk for folks around here... (and maybe some of it will make it to my house) ha ha ha Thanks again..