I have a problem with no ground to the taillight control relay. It causes the relay not to turn on. As far as I can tell it is switched by the column switch ( checks out OK) and this unknown relay called the headlamp retainer. I believe that this relay is the root of no ground to the taillight relay. The retainer control box also controls the headlights and running lights after the vehicle is turned off and the door has not or has been opened. The FSM has nothing written about it and I don't have a EWD. I would imagine that this is for us pansie a__ americans who want the headlights to stay on after the vehicle has been shut off. I was hoping that the main plug in for it would have a bypass plug of the sorts. But no such luck and the search has nothing on it, does anyone know about this system?