I am going to install the horn grill lights on my 71S. Does anyone have a car that came equipped with this option from the factory? My question is, are these lights turned on by the same switch that activates the lights in the front bumper(valance)? Pull it out and you have bumper lights,or rotate it and have through the horn grill lights. How are these activated? Or is there a seperate switch? none of the owners manuels address these rare lights.