2005 hyundai sonata

Question edited for clarity

Here is the diagram
There are others and videos as well

https://www.google.com/search?q=2005+hyundai+sonata+serpentine+belt+diagram

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Could be like a Toyota and have a "pack" that controls the head lights. Toyota does not have these for sale to the public but will replace them for you. Hopefully if the "pack" is what is wrong Hyundai has them available for sale to customers. On Toyotas t
they are expensive just for the parts. Add the labor and I could fly from coast to coast and back for the price of having them replaced.

Bad connection in the dimmer control between hi and low beam. Replace the dimmer switch electrics.

3 choices,bulbs gone......fuse blown.....dip switch gone,check cheapest FIRST.(are you sure your sonata was made in Korea as most are made in CHINA.its the largest TAXI fleet in the WORLD.)

replace the low beam bulb

with or without DRL (day time running lamps)

if without...
since both headlamps have their own fuse I would start by testing the headlamp (low) relay

if however, the high beams do not work either, then you may have a more serious wiring concern


let me know if you need any further assistance

There may be a relay that operates the low beam lights, check the owners manual to see if there is a relay, you should be able to hear it go "click" if there is one.

Start by checking your fuses. Use your manual or the door to the fuses is normally labeled with what each fuse goes too.

dear friend-i suggest you check current,then the bulbs,then the relay,you will find your problem there.

On this website you find fuse box diagram and description for Hyundai Sonata

Hyundai Sonata 2005 2008 fuse box diagram Auto Genius