Ok... need a little more info here... but if the high beams work manually, but not with the auto dimmer, my first guess would be that you have a faulty relay somewhere in the system. If the highbeams don't work at all (manually or otherwise) then I would guess the highbeams could be burned out, or you could have a faulty dimmer switch / relay. Good luck!
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Your headlights may not dim because you don't have dimmer lights. Dimmer lights can blow and leave you with just the high beams.
If your high beams still work it is the dimmer switch.
Normally caused by faulty dimmer switch.
You may need to replace your dimmer switch.
I would suspect the dimmer switch or "combination switch".
the dimmer switch is going out if you are experencing that.
To find the cause of the low beams not working, start with the bulb to make sure both are ok. Check the dimmer switch, and the wiring from the switch to the headlights.
dimmer switch dimmer switch
It is on the side of the steering wheel and is used for turning your headlights on and off it is also used to control your high beams and low beans
try checking ur high-bea fuses and relays
== == more than likely your dimmer switch is bad,hope that will help
Bad bulbs Bad dimmer switch Believe it or not, you can blow the filaments for low or high beams only, without affecting the opposite. However since it is highly unlikely that you are going to blow the same filament in both lights at the same time, I would suggest that you check your dimmer switch.