When high beams are turned on the light goes to very low beam, dim when on low beam also
X2 bad ground to lamp. located THERE
Check and see if your ground wire is grounding properly. I ran a new ground wire right from my engine and works good now. Some times the ground wire is affected by rust if it's grounded to the body itself.
SOURCE: Suzuki swift Headlight problem
Have you checked to see if this is a wiring problem or maybe a relay problem?
Recently my lights would work on side lights and not anything else and this was down to dodgy wiring and needed a new relay unit.
SOURCE: headlight problem
You probably need a new combination switch, located in the steering column, integrated into the control lever for lights. Remove airbag (if you have one) and then pull off steering wheel to access switches. We bought ours at you-pull junkyard, but I believe AutoZone also carries them for far less than dealer price.
SOURCE: HEAD LIGHTS KEEP BLOWING
If it isn't a vibration problem (which light bulb filaments don't like) it may also be because they are on all the lime and have limited life. That's what my wife had going on in her SAAB.
The solution is to solder a diode in series with the ground wire from the lamp with the cathode end of the diode (striped end) away from the lamp. Use radio shack 276-1661 or equivalent 6 amps or more diode. Have this done by a good soldering nerd like me and have them use heat shrink to seal the connections. (Don't use a flame near the battery to shrink the tubing).
The diode reduces the voltage to the bulb, increasing life. Bulb may be a bit dimmer but not noticeable. Note: Solution may mess up bulb indication on fancy cars that may use some bad bulb detection signal on the wire; most dealers wouldn't know unless they are really up to snuff.
SOURCE: low beam lights not working
this is usually the headlight switch that causes this problem, burned connector to switch or contacts in switch or both.
SOURCE: head lights won't work. drl and high beams work
Check for sure, that both bulbs haven't somehow (unlikely, I know) blown out. If they are both fine, it could be the headlight switch. Another possibility, there was a recall recently for the headlights due to the splices not staying together, causing the regular headlights to not function. This recall affected over 90,0000 Suzukis of different model years. Hope this helps, sorry I couldn't give you anything concrete
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