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#2861 of 3420 Headlights will not turn on
Nov 04, 2007 (4:36 pm)
Hello All: Pertaining to a 2002 Hyundai Elantra GLS. The headlights (low and high beams) don't work. I installed new low beam bulbs (H7-55). They still won't work. I also checked all fuses and breakers. What now? Thanks.......
#2862 of 3420 Re: Headlights will not turn on [dukecity]
Nov 05, 2007 (5:26 am)
In addition to the fuses under the hood, have you checked Fuse 20 in the Passenger Compartment Fuse Box? The main power for the low beams and high beams comes from the fuses under the hood and is always on, but the power used to switch the coils from from Fuse 20 inside. Here is the schematic, FYI:
P.S. this probably should be posted under Maintenance and Repair in the Elantra section.
#2863 of 3420 Re: Headlights will not turn on [doohickie]
Nov 05, 2007 (6:39 am)
First and foremost Thank you (Pat?)for moving my question to the right forum. (MY bad) Second thank you doohickie for the very informative post. I will recheck all fuses as soon as I get home from work. Thanks again.............
#2864 of 3420 Re: Headlights will not turn on [dukecity]
Nov 05, 2007 (7:42 am)
No problem, don't worry about it - we're glad to have you as a new member! Let us know what you find.
#2865 of 3420 Re: Headlights will not turn on [doohickie]
Nov 05, 2007 (3:51 pm)
I already checked all of the fuses that you just showed me in this diagram. The headlights will not turn on. The fuse box you are refering to is behind the ash tray on the drivers side? If so, I already checked these. I might add that there is not a dedicated fuse that mentions high or low beams. All fuses are good. What next? Thanks
#2866 of 3420 Re: Headlights will not turn on [dukecity]
Nov 05, 2007 (6:07 pm)
Did you check the headlight fuses in the engine compartment?
#2867 of 3420 Re: Headlights will not turn on [doohickie]
Nov 06, 2007 (5:36 am)
Yes I did check the fuses (breakers?) in the engine compartment. I did so by changing the fuse to another position to see if that appliance continued to work. ie: I swapped the headlight fuse for the horn fuse etc. I also ran a continuity check on the wiring up to the headlight plug. All was OK. I also noticed that the high beams don't work either. BUT the parking (orange lights) work just fine. Right now this has become a day time car only. Is there a fuseable link anywhere? (I changed the two low beams two days ago) I completely removed the light assembly and checked all of those connections while on the work bench. I'm sure when this is all said and done it will be something simple. I/we just have to find it. Thanks again...
#2868 of 3420 Re: Headlights will not turn on [dukecity]
Nov 06, 2007 (11:40 am)
I guess check the whole system point by point. Are you getting 12V to the fuses? To the relays? You have to check per the schematic I posted. Sounds like maybe, just maybe, it's the switch?
#2869 of 3420 Re: Headlights will not turn on [doohickie]
Nov 06, 2007 (2:19 pm)
I too thought it might be the switch. I will, as you say, have to go point by point. Yes there is 12 volts going to the fuses and relay(s). Is there a fool proof way to check the relay? Are the relays in the electrical box on the front drivers side fender? If so where can you purchase these if needed. I must say thank you again, for your undivided attention in this matter. Will keep you posted.
#2870 of 3420 Re: Headlights will not turn on [dukecity]
Nov 06, 2007 (5:39 pm)
Cheap trick: put your finger on the relay and see if you feel a 'click' when the headlight switch is turned on. I know the relay isn't very big, but even the small ones will typically give a little click when activated.
The relays will usually show a schematic on the side indicating which contacts are the coil. If you pull the relay you can use your voltmeter between the coil pin of the socket and ground and see if you are getting power when the switch is turned on. If you are, check the pins for the switching contacts and see if you have +12vdc there.
Just a quick and dirty to see if the problem is on the control side (from the switch) or on the sourcing side (the contact path to the lights).
Looking at the schematic, you may have a bad ground at G15. That should be somewhere up around the front, but if that ground is bad, both sides low and high will not work.