Headlights don't work but High-beams do - Hyundai Forums : Hyundai Forum
 
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#1 Old 10-05-2012, 10:05 PM
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Headlights don't work but High-beams do

The normal lo-beams won't turn on no matter what I do, but the brights still work. The bulbs are good, the fuses are good. I've tested and changed those. They're good.

What's the issue? Is it a relay? Anyone had this problem? '08 Santa Fe
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#2 Old 10-05-2012, 11:22 PM
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santa06 is an unknown quantity at this point
Do you have day time running lights ; they have a separate module that is tied into the head lights.

Were the headlight bulbs tested with a meter for continuity on the filament , visual not good enough IMO.
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#3 Old 10-05-2012, 11:42 PM
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Originally Posted by santa06 View Post
Do you have day time running lights ; they have a separate module that is tied into the head lights.

Were the headlight bulbs tested with a meter for continuity on the filament , visual not good enough IMO.
I replaced them with new bulbs. Didn't work.

Pretty sure I don't have running lights. Just the GLS basics
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#4 Old 10-06-2012, 01:35 AM
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Try swapping relays between low and high beam. In the box under the hood.
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#5 Old 10-06-2012, 01:57 PM
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ptw016
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Originally Posted by canderson View Post
Try swapping relays between low and high beam. In the box under the hood.
I swapped out different relay fuses and tried the spare fuse and horn fuse for the lights and got nothing to work. High beam relay fuse(s) are rated at different current levels, but I tried one of those too. It looks like the low beam circuits just aren't getting any power.

I'm guess I'm just worried that if I take it somewhere (particularly the dealer) they'll make me replace some big electrical part instead of truly diagnosis a lose wire here or whatever it is.
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#6 Old 10-06-2012, 08:21 PM
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canderson is an unknown quantity at this point
If you're able to deal with a wiring diagram, the one attached applies to your '08 model. This and a meter should make you dangerous enough to locate the problem.
Attached Files
File Type: pdf Head Light Schematic.pdf (25.3 KB, 29 views)
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#7 Old 10-06-2012, 09:01 PM
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The relays are only good for 10,000-15,000 clicks. A click is counted x2 every time you turn your lights on. One on and one off. Try replacing the relay
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#8 Old 10-11-2012, 11:08 PM
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santa06 is an unknown quantity at this point
Two separate relays would have to die simultaneously for both low beams not to work ; doen't seem that likely.

Nice diagram from Canderson , I think you need to look at the output from the BCM module , the brown orange wire.
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#9 Old 10-12-2012, 11:43 AM
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polarfest is an unknown quantity at this point
corrosion at the relay sockets? fried relay? did you measure any voltage at the bulb plugs?
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