Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Head Lamps Repair procedures
Inspection
1.
Check the battery voltage. (Low beam will be on when the battery voltage above 9V.)
2.
Check the fuse and relay.
3.
Check the polarity of ballast. (If the polarity are changed, low beam doesn't lighten)
4.
Check the bulb connector securely.
5.
Visually bulb checking ...
Hyundai Sonata LF 2014-2019 Owners Manual: System setting and activation
System setting
The Driver Attention Alert system is set to be in the OFF position, when
your vehicle is first delivered to you from the factory.
To turn ON the Driver Attention Alert system, turn on the engine, and then
select 'User Settings → Driving Assist → Driver Attention Alert → ...