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Headlight System: Inspection: Trouble Symptom

WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
Symptoms Reference
Headlight does not illuminate, or headlight is weak. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>CHECK HEADLIGHT SYSTEM 
Light does not illuminate though the surrounding is dark, or it remains illuminating though the surrounding becomes brighter.
(Everything except auto headlight operates normally.)
Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>AUTO HEADLIGHT SYSTEM CHECK 
Welcome lighting does not illuminate. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>CHECK OF WELCOME LIGHTING SYSTEM (IF IT DOES NOT ILLUMINATE) 
Welcome lighting does not go off. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>CHECK OF WELCOME LIGHTING SYSTEM (IF IT DOES NOT GO OFF) 
The wiper interlocked headlight does not operate. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM>INSPECTION>CHECK WIPER INTERLOCK HEADLIGHT SYSTEM