need help rewiring service body tail/turn/backup lights

As for the round lights I assume you have a red wire, black wire, and a white wire coming from the light not counting the reverse light wire. The red wire is brakes/turn signal (yellow wire = left, green wire = right), the black wire is marker lights (brown wire or black wire), and the white wire is the ground (white wire). Brakes and turns are kind of one and the same. The turn will cancell out the brake for the direction turning.