Troubleshooting the Lighting System (Hyundai Elantra XD)

Sign	Probable cause	Method of elimination
Only one external lighting lamp is not lit	The light bulb burned out	Replace the lamp
Only one external lighting lamp is not lit	The lamp socket is faulty or the wiring is damaged or shorted to ground	Check the socket or repair the wiring
The headlights are not working	The light bulb burned out	Replace the lamp
	Fuse #12 (10A) has blown	Replace the fuse
	Headlight relay faulty	Check the headlight relay
	The light switch is faulty	Check the light switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
	The fuse (10A) has blown	Check for short circuit and replace fuse
The rear lights and license plate lights do not work	The fuse jumper has burned out	Replace the burnt jumper
	The relay is faulty	Check the relay
	The light switch is faulty	Check the light switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
The brake lights are not working	Fuse #16 (15A) has blown	Check for short circuit and replace fuse
	The brake light switch is faulty	Check the brake light switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
	The brake light relay is faulty	Replace the brake light relay
The brake lights are constantly on	The relay is faulty	Check the relay
The brake lights are constantly on	The brake light switch is faulty	Check the brake light switch
The instrument cluster illumination lamps do not light	Rheostat faulty	Check the rheostat
The instrument cluster illumination lamps do not light	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
The direction indicators do not light on one side of the car	The light bulb burned out	Replace the lamp
	The turn signal switch is faulty	Check the turn signal switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
The direction indicators do not work	Fuse #7 (10A) has blown	Check for short circuit and replace fuse
The direction indicators do not work	The turn signal relay is faulty	Check the turn signal relay
The direction indicators do not work	The turn signal switch is faulty	Check the turn signal switch
The direction indicators do not work	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
The hazard warning lights are not working	Fuse #1 (10A) has blown	Check for short circuit and replace fuse
	The relay is faulty	Check the relay
	The switch is faulty	Check the switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
The turn signal lights flash too fast or too slow	The lamps have a power consumption greater or less than required	Replace the bulbs
The turn signal lights flash too fast or too slow	Flashing light source is faulty	Replace the flasher source
The reverse lights do not work	Fuse #1 (10A) has blown	Check for short circuit and replace fuse
	The reverse light switch is faulty	Check the reverse light switch
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring
Console and luggage compartment lights do not light	The fuse (50A) has blown	Check for short circuit and replace fuse
	Fuse #25 (10A) has blown	Check for short circuit and replace fuse
	The electrical wiring is damaged or shorted to ground	Restore the electrical wiring