Check Turn Signal And Hazard Module
WARNING: This page is about a different car, the 2015 Subaru XV Crosstrek and 2015 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Refer to "INSPECTION" of the "Turn Signal Light and Hazard Light System". < Ref. to INSPECTION , Turn Signal Light & Hazard Light Module.>