Your Subaru's running lights are probably wired in series with the ignition switch. When the engine is started the lights come on. My '99 Chevy van has big amber front running lights rigged that way. It took a little getting used to, having Big Brother think for me I mean. I quickly got used to it, though, and now it's kind of neat. Mine also has a light sensor that turns on the actual headlights in dim light, too. They tried to make it idiot proof, though I can't understand why. 