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 Service Manual: Coolant Repair procedures
Replacement And Air Bleeding
Never remove the radiator cap when the engine is hot. Serious
scalding could be caused by hot fluid under high pressure escaping from
the radiator.
When pouring engine coolant, be sure to shut the relay box
lid and ...