[Lynn Miner]

Chuck is absolutely correct. The switch controls the door roundel lights. If you look up under the passenger side about where your knees would hit the bottom of the dash, you will find a brown wire and a gray/red wire that are wire tied off and go nowhere. These can then be routed to the doors and the rear deck. I will be posting a "how to" in the next few days detailing the entire procedure on installing original style number lights. I just finished the lights on my car last week.