Headlights won't turn on/ 2006 impreza sport/ parking lights are on but not the headlights

Often humorously called the 'virgin switch', check the rocker switch on top of the steering column. Likely hit accidentally, perhaps when detailing the interior.

is the vehicle equipped with auto headlights? if so try turning off lights manually.

something on in your car is sucking the juice,a door not closed completely or inside lights left on or headlights or parking lights dome lights,ignition not completely shut off,hood light trunk light etc check them all,if car turns over when charged but wont start it could be your fuel pump or broken timing belt

The issue is most likely the turn signal switch.

I don't know about the 2007's but earlier models have a parking light switch located on the top of the steering column. See if there is a switch there that got moved when cleaning.

It's not the brake switch. the lights for the brakes, turn signal, headlights, and parking all go to the turn signal switch/ multi fuction switch. this is wher your problem is probably coming from

Check the parking light switch on the top of the steering wheel.

there ie a switch for parking lights on top of steering column ..i bump it all the time!

check all grounds

i had the same problem with my 2003 wrx you have 2 choices on how to fix it the first is take the car to a subaru dealer and they can do it for you. Or you can do it yourself like this under the bonnet at the front of the grill you'll see a row of clips first you have to pop them out to remove the grill fully from the car that will give you access to the 3 or 4 bolts holding the light to the car you have to undo these bolts and remove the entie light from the car this will give you fully access to the park light fixture simply twist it so it pops out the headlight and replace the bulb ..... the spot lights are the same remove the grill and the headlight from the car this makes a gap if you look threw and down this gap you will see the back of the spot light fixture simply twist (unclip it depending on the year of the car) it to remove it and replace the bulb once you have done this bolt the headlight back in and clip the grill back into place