My low beams won't work on my 2001 Mazda Miata. The High Beams work and the fog lights also work, just the low beams not working. I checked the relay under the hood on the passenger side and it looks ok. Also checked the fuse under steering wheel and it also looks fine. There are two wires going to the bulb housing, red / white & white. I have voltage to the bulb housing, 12v on the red / white wire, and 12v on the white wire when the switch is pointing to low beams. Also 12v on the red / white wire, and 0v on the white wire when the switch is pointing to high beams. Not sure how the lights are grounded.

SOURCE: Lo-beams not working

Hi manolonusa,

It may have something to do with your headlights, but my first thought is they are just a symptom of another problem.

I'd check on the alternator. If the ALT fails, a good battery will keep the car running for quite a while. Sometimes the first symptoms are the dimming of the headlights. So:

• Make sure belts are tight.
  
• Get a meter and test the output voltage while its running (be careful when doing this).
• Check the voltage at the battery when stopped and when running.
• Same thing with headlights on and off.

SOURCE: Low beams on the Mazda5 just stopped working. Both

sounds like a defetive dimmer switch in the colum

SOURCE: 2005 mazda 6 V-6 3.0

hi try checking the relays the 1 for the low beam may be faulty

SOURCE: Mazda Protege 2000 - low

turn signal switch needs changing, it only has 1 or 2 screws that hold it in there. the dimmer is bad

Bogdan Odwazny

• 6171 Answers
• Posted on Feb 26, 2013

SOURCE: Please Help!! Where is the headlight relay switch on my 1995 mazda Protege

check the fuse first.