Headlight Symptom Diagnosis

WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.

HEADLIGHT SYMPTOM DIAGNOSIS

Condition	Possible Cause	Action
Only one low beam does not light up	Circuit fuse blown	Replace fuse and check for short circuit .
	Bulb blown	Replace bulb .
	Wiring or ground faulty	Repair circuit .
Low beam does not light up	Circuit fuse blown	Replace fuses and check for short circuit .
	Headlight low beam relay faulty	Check headlight relay referring to TAIL LIGHT RELAY, HEADLIGHT RELAY, FRONT FOG LIGHT RELAY INSPECTION .
	Lighting or dimmer switch faulty	Check lighting and dimmer switch referring to HEADLIGHT SWITCH (IN LIGHTING SWITCH) INSPECTION .
	Bulbs blown	Replace bulbs .
	Wiring or ground faulty	Repair circuit .
	BCM faulty (DRL model)	Check BCM for function referring to INSPECTION OF BCM AND ITS CIRCUITS .
Only one high beam does not light up	Circuit fuse blown	Replace fuse and check for short circuit .
	Bulb blown	Replace bulb .
	Wiring or ground faulty	Repair circuit .
High beam does not light up	Circuit fuse blown	Replace fuses and check for short circuit .
	Headlight high beam relay faulty	Check headlight relay referring to TAIL LIGHT RELAY, HEADLIGHT RELAY, FRONT FOG LIGHT RELAY INSPECTION .
	Lighting or dimmer switch faulty	Check lighting and dimmer switch referring to HEADLIGHT SWITCH (IN LIGHTING SWITCH) INSPECTION .
	Bulbs blown	Replace bulbs .
	Wiring or ground faulty	Repair circuit .