I'm reviving this thread for a question.
My sister bought a '15 outback limited a couple of months ago. She called me yesterday, frantic. Her parking lights were on even though the car was off. Since '15 don't have the "virgin switch" it wasn't that. We walked through a bunch of things. When the car was on, the headlights were on (not Auto), the Illumination Switch didn't dim the dash lights, they were full power all the time. It was also at night.
Can a faulty Illumination Switch cause the parking lights to be on all of the time?