I have the same problem. 2007 Legacy.... Had it in the shop, and they had to replace the whole assembly (light switch arm and worthless switch on top of steering column), which is in the center of the steering wheel. It worked great for 4 months and is now out again. If I have the headlights turned off and the parking brake on, I have tail lights and front marker lights. As soon as I release the parking brake I lose them all, including license plate light. I'm wondering if there is a switch associated with the parking brake similar to the brake light switch under the dash. Can't afford an auto electric shop, and certainly can't afford the dealer labor rates. already $400 into it and frustrated!!!!!