2007 Hyundai Santa Fe left turn signal blinks fast all of the time and the right turn signal blinks fast when the headlights are on. All bulbs good.

OPEN GLOVE BOX
REMOVE USERS GUIDE AND READ.
SEE PAGE 7.56

OR HERE, IF LOST

https://www.carmanualsonline.info/hyundai-santa-fe-2010-owner-s-manual/?srch=LIGHT+BULBS

if the bulb flashes fast then you need to replace one of your bulbs i had the same problem on my mustang the right turn signal flashed like a mad man the problem was the brake light on one of the bulbs died

look in plug bad or loose connection can cause this problem . check wiring going to other light

mporteous, It sounds like you have a light switch problem. I can't think of any other reason for the running lights and tail lights not working in this situation. Are your brake lights working when the headlights are off and how about when they are on? Do your four ways hazard lights work in these situations? Try all the lights under these conditions. The reason the left turn signal blinks very fast is because one of the bulbs are burned out. Try the left signal and one light (front or back) will stay on and the other will not come on at all. Replace the bulb that does nothing. Do this before you try all the lights in different situations. I think that you will have to replace the light switch. Good luck with this.

1. Before servicing the vehicle, refer to the Precautions Section.
   
2. Disconnect the negative (-) battery terminal.
   
3. Loosen the mounting bolts and nut of headlight assembly (A).
   

   Loosen the mounting bolts and nut of headlight assembly (A)-Santa Fe
   Click to Enlarge

   Loosen the mounting bolts and nut of headlight assembly-Veracruz
   Click to Enlarge

4. Take care that retaining clip (A) is not to be damaged-Santa Fe.
   

   Take care that retaining clip (A) is not to be damaged-Santa Fe
   

5. Disconnect the headlight electrical connectors.
   
6. Remove the headlight assembly.
   
7. Remove the headlight bulb:
   
   • Remove the headlight bulb(s) with a counterclockwise turn-Santa Fe.
     
   • Remove the headlight bulb after removing the bulb caps (A)-Veracruz.
     

     Remove the head lamp bulb(s) with a counterclockwise turn-Santa Fe
     

     Remove the headlight bulb after removing the bulb caps (A)-Veracruz
     

To install:

1. Install the headlight bulbs.
   
2. Install the headlight bulb caps-Veracruz.
   
3. Connect the headlight electrical connector.
   
4. Install the headlight assembly.
   
5. Connect the negative (-) battery termina

once bolts out lift up on the headlight unit hope this helps plz vote comment reply if you need more help

2003 Hyundai Santa Fe - Sylvania Headlight Bulb Part number: SY-9003ST Manufacturer number: 9003ST var images0 = 'L2ltYWdlcy9wcm9kdWN0X2ltYWdlcy9pbWFnZXMvc3lsdmFuaWEvU1ktOTAwM1NULmpwZw=='; var products0 = 'U3lsdmFuaWEgSGVhZGxpZ2h0IEJ1bGI='; var descriptions0 = 'U1lMVkFOSUEgOTAwMyBTSUxWRVJTVEFSIEhJR0ggUEVSRk9STUFOQ0UgSEFMT0dFTiBIRUFETElHSFQgQlVMQiAtLSBMb3cgNTUvaGlnaCA2MCB3YXR0cywgRHVhbCBDLTggZmlsYW1lbnQgZm9yIGJvdGggaGlnaCBiZWFtIGFuZCBsb3cgYmVhbTsgMTAwIHBlcmNlbnQgbGVnYWwgaGFsb2dlbiBoZWFkbGlnaHQgYnVsYnM7IEZlYXR1cmVzIHRoZSB3aGl0ZXN0IGFuZCBicmlnaHRlc3QgbGlnaHQgY29sb3Igc2ltaWxhciB0byBkYXlsaWdodCBmb3Igc2FmZXIgbmlnaHQgZHJpdmluZzsgTWVldHMgYWxsIFVTIEZNVlNTIDEwOCBhbmQgQ2FuYWRpYW4gQ01WU1MgMTA4IHJlcXVpcmVtZW50cy4='; zoom

you need a torx screwdriver

Headlight low beams blow simultaneously sometimes. Actually quite often, for some reason.

Check for voltage with a 12v test light or a voltmeter at the light bulb plug.

Usually a fast turn signal means that there is a light out. You should probably check all of your lights, including back-up lights, and turn signals. If there is one out then replacing the burnt out bulb should fix the problem.

There is a fuse, but only for both headlights, not just one. The headlight bulb must be out. Or the wire connector came off. Take care and God Bless.