wiring a trailer?

ok, i know this isn't a trailer forum but i trust the comments made in this forum, after all, i bought a truck on your opinions, so heres my problem. i've built a trailer from a frame of an old camper. its all done except for the lights in the rear. my truck, a 99 f150 has the 4 pin harness so i know the plug i need to buy, but does anyone have a diagram or know where to go to find out how to wire it? thanks, any comments appreiciated.

White is ground
yellow is left turn
green is right turn
brown is running lights

great, thanks a lot