need help rewiring service body tail/turn/backup lights

[whers the snow?]

1989 chevy 3500 field pickup with a service body that has round tail lights and reverse lights. i have it so my reverse lights work when in reverse, blinkers work, brake lights work, but cant figure out how to get my running lights hooked up so they work with the blinkers. anyone had experience with this before?

 

[WestMont]

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.