I don't think my last thread was clear.....
In other words, my reverse lights are on only when my headlights are on, and when the headlights are on, the reverse lights are on.
The reverse lights do not respond when I put it in reverse. They're on constantly when I have the headlights on. Regardless of whether I have my headlights on or off, the reverse lights don't come on when I put it in reverse. They simply stay on when I have my headlights on.