Those lights are on different circuits. The high and low beam lights are powered thru the headlight switch, the turn signals, brake, and hazards go thru the turn signal switch.
I would want to know if each circuit has power at the switch that controls it.
SOURCE: head lights not working
check your relays, they are like big fuses in your engine compartment, if your low beam and high beam relays are the same model, switch them and see if this enables low beams and disables the high beams. if it not the relays, or fuses, then it is probably your wiring harness, an expensive repair.
SOURCE: Low Beams Don't Work!
There is more than one relay I know but make sure your bulbs are good I HAVE seen this happen more than once.. low beams can go at once.. and still have hi beams check this first please .. Jerry
SOURCE: low beams dont work, only high beams do. 02 tacoma
If there is power there, then it has to be the bulbs. The trouble that most people have is, they don't see how both bulbs could burn out at once... and they're right. They don't. But you see vehicles with one headlight all the time. They don't know it unless you tell them or they happen to see it themselves. Then the second light burns out, and they think it's a major catastrophe, when in fact, it's just bulbs. The high beam still works because the bulb is double filament. The only other thing it can be is the dimmer switch, and since you switched it to high, it appears to be working. However, if it's not bulbs, it still could be the switch.
SOURCE: low beams don't work - both out at the same time.
DID YOU CHECK THE BULBS?
Testimonial: "spot on."
SOURCE: High Beams, parking lights work. Have NO low beam
had same problem had to replce whole turn signal switch
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