Dave,
I sent you the wiring diagram I drew up, did that not work for you? The one linked shows diodes in the running light circuit. There's no need for them in that circuit. When power is applied to that circuit from the coach, all that will happen is the parking lights and side marker lights in the front will light up too, along with the rear tail lights. That's perfectly fine. Power applied to that circuit WILL NOT LIGHT UP THE HEADLIGHTS ON THE TOAD!
You just need diodes in the turn/brake circuits to prevent signals from the coach from traveling up stream in the toads wiring up front. You only want the coaches brake/turn signal power going to the tail lights only, not the fronts. That's why I told you where to insert the diodes to prevent that from happening.
Scott
