The light's themselves would need to have power. I know the wire pattern that comes from the car, just not the configuration of the pattern on the light's plug.
Seeing how the car is domestic to Japan, I was hoping to find someone in Japan that may have the resources to obtain the plug's pinout or configuration. Or perhaps a website to review, or person to contact. If it were a Ford or a Chevy I would have been able to obtain the knowledge without effort due to them being domestics here.
Like I said it's probably a long shot.