Possibly two bulbs, possibly the switch. Get it diagnosed.
check your fuses for your headlights. i have a '97 accord and installed aftermarket headlights and one day one of my lowbeams wouldn't work but my high beams would be on with my low beams on, and when i switched for the highbeams, my low beams would both go out. you can get a thing at shucks, or even Walmart, to check the fuse to see if it's working, very simple to use. :)
Did you try replacing the one headlight that only works on the high beam mode?
First check to see if you have a relay. If it dont have one, the problem lies on the dimmer switch. Locate the dimmer switch. On some vehicles the dimmer switch is part of your headlight switch.
If only one of your headlights is affected then it probably isn't a fuse or relay. A light that is both a low beam and a high beam has two filaments. One of the filaments is probably broken. Replace the headlight and it should fix the problem.
i did replace the lamp on a 96 sunfire and the low beam still does not function. highbeams work fine, but no low beams on both headlights now.
I have a similar problem. Both headlights low beam filaments on my WRX STi had blown and the replacement low beam filaments blew too??? So I've still only got high beam which is fine but other drivers are getting a wee bit annoyed (and rightly so)All fuses are good and correct factory ampage. The new bulbs are H4's which is the factory correct bulbs yet low beam filaments gone on both bulbs. I'm bewildered...
Fuse or bulbs burned out. On most they are separate bulbs or high beam filament is broken if 2 in 1 bulbs.
First check the bulbs, if the bulbs are good I would suspect the high/low beam switch is bad.
Check your owners manual.
Bad bulbs?Bad Hi-low switch?
Your high beams work but your low beams do not because the switch is broken that switches between high and low beams. Electrical switches wear out.
fuse, bulbs or switch
Headlights have two filaments; one for low beams and one for high beams. There is a good chance that the low beams are burnt out. This doesn't necessarily mean that the high beams won't work. However, it's not too common for both low beams to burn out at the same time. Of course, it could be a fluke. I would replace the headlights with new ones and then go from there.
Bad bulbs Bad dimmer switch
Bad dimmer switch.
Try pushing the high beam lever forward. In some cars pulling this towards the driver only "flashes" the high beams, like for warning another driver. To make the high beams remain on usually requires the lever to be pushed forward. Either that or you have a defective switch in the turn lever that needs to be replaced.
If low beams do not work and the high beams of a Mitsubishi Eclipse do, it is probably due to a corroded connector. Simply clean the connector and add some petroleum jelly to the terminals.
Take your car in to have it checked. Turn signals should work without high beams.