Need wire color code for ford F-250 tailer towing wiring

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Need color code for radio wiring - Ford F150 Forum

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Mar. 10, 2017 - 1997 - 2003 Ford F150 - Need color code for radio wiring - I'm trying to replace factory am/fm cassette stereo in 1999 f-150 with aftermarket cd player and ...
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Here too

https://www.scosche.com/media/guides/fd1441.pdf

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Try a library for a repair manual. That may not help, pretty hard to find fuse block wiring off a diagram. Find this truck at a salvage yard, take the fuse block off with wires cut way back so you can see color of the wires.

tail light relay bad
tailer hitch hacks (wiring hacks)
what country each country has unique wire color codes, by laws.
go to alldata.com and see USA wiring and canada and if you have DRL see that, .

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I can send you full color wiring diagrams

MY Autozone carries the Chilton or Clymers for this year. The book has the wiring diagram.

Car Radio Battery Constant 12v+ Wire: Red/White
Car Radio Accessory Switched 12v+ Wire: Blue
Car Radio Ground Wire: Black/Gray
Left Front Speaker Positive Wire (+): White
Left Front Speaker Negative Wire (-): White/Brown
Right Front Speaker Positive Wire (+): White/Violet
Right Front Speaker Negative Wire (-): White/Orange
Left Rear Speaker Positive Wire (+): White/Green
Left Rear Speaker Negative Wire (-): Brown/Yellow
Right Rear Speaker Positive Wire (+): Brown/White
Right Rear Speaker Negative Wire (-): Brown/Blue

Just tap off of the rear lights , You can do most of the wiring on one side and only have to tap the indicator off the other side.
shouldn't need a relay unless you have lots n lots of lights on the tailer.
Hope this helps.

not knowing your color coding switch the r/ turn wires around

national code is yellow green for turn and stop brown for tail white for ground. if national yellow and green backward.

Go to your local library. They generally will have both the Chiltons Motor Manuals and Motor Manuals available for your use. These will have separate sections on your vehicles wiring diagrams. Color codes and all. Best of all they are free. Also some parts stores, Murray's, Pep Boys, AutoZone etc will let you look at the appropriate manual for your vehicle. If you are trying to troubleshoot a problem, I suggest the Library. Chilton's has a good trouble shooting section for Ford Truck wiring. Also you can check the book out and take it home to use while you are working on the truck.