Rear Lights wiring change

[crustysarge]

I have to make some changes to my rear lights for the European inspection, must have yellow rear turn signals. I am thinking about putting a yellow bulb in the reverse socket and wire it to the turn signal circuit. I could then install a white or clear light down by the bumper for a reverse. The red cannot blink with the yellow. Now, does the turn signal and brake light work on the same circuit and get controlled by the coulmn switch? How do I need to wire this?

Other ideas?