Maintenance Inspections for Subaru:
It’s not usually necessary to check the operation of the horn. If it doesn’t work, the chances are pretty good the customer will have already told you about it. If the vehicle is equipped with dual horns, make sure both horns are working properly.
Lights and Switches
Turn the headlights, running lights and emergency flashers on, then take a walk around the vehicle to check their operation. For most people, winter includes more than the usual amount of night driving, so proper lighting operation is especially important. From inside the vehicle, check the operation of the turn signals, as well as the high and low beam headlight switch.