Quick Answer: Is it possible for both headlights to go out?

What happens if both headlights go out?

If neither of your headlights work it’s time to do some detective work. Solution: If both headlights aren’t working, it’s unlikely that a bulb is at fault. The likely cause is a fuse, headlight relay, headlight switch, dimmer switch or a wiring fault. About the only cause that is an easy fix is a blown fuse.

Why would both headlights suddenly go out?

Most total headlight failures are caused by a bad component like a fuse, relay, or module. Wiring problems can also cause both headlights to stop working. … The cause: A burned out bulb, or a problem with the high beam switch or relay. The fix: Replace the bulb, switch, or relay.

What can cause your headlights to not work?

4 Reasons Your Headlights May Not Be Working

  1. Burned-Out Bulbs.
  2. Damaged Relay. …
  3. Wiring Problem. …
  4. Blown Fuse. One of the first things you should do in the event of an electrical problem like nonfunctional headlights is to check the appropriate fuse. …

Can a blown fuse cause headlights to go out?

If a headlight fuse blows, it could cause the headlights to stop working. Most headlight systems are also designed with a relay that switches the power between low beam and high beam headlights. If this relay goes bad, it could allow power to the high beams, but not the low beams.

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Is it illegal to drive with high beams on?

Can I Drive with My High Beams On? It is illegal if you flash or use high beam headlights within 500 feet (0.15 km) of the oncoming vehicle (oncoming traffic). … In the case that oncoming drivers refuse to dim their headlights, you have to keep your eyes on the right edge of the road ahead.

Why does my right headlight keep going out?

This sounds like the bulb filament in the glass is intermittently loose or the plug connection to the back of the bulb is loose, corroded, broken, or intermittent. … If you leave body oil on it, the bulb could shatter in use. Also, keep bulbs away from your face as they can shatter and cause eye injury.

Why is only one of my headlights working?

You’ll need to replace the bulb, switch, or relay. If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low beams are related to a relay or the high beam control switch.

Can you drive with one headlight out UK?

Driving without proper working headlights is illegal. … If you drive with one headlight you will be pulled over by the police and they will hand you a fixed penalty notice fine of £100. This will not add points to your licence, but is intended as a warning to fix your headlights.

How do I know if my headlights are bad?

One of the first symptoms of a bad or failing headlight bulb is dim headlights. Over time headlight bulbs can wear out and begin to shine noticeably dimmer than when they were new. A dim headlight will not provide proper illumination and is also usually a sign that the bulb is approaching the end of its service life.

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How long should headlights last?

The typical car headlight can last 500 to 1,000 hours, but there are a lot of factors that can change that. In fact, some headlight bulbs are efficient enough to last well over 30,000 hours.

How do you diagnose headlight problems?

Diagnosing the issue is a straightforward process.

  1. Turn on your headlights. Replace whichever headlight bulbs do not turn on. …
  2. Open the engine compartment fuse box. Pull the fuse that operates on the non-functioning headlight circuit. …
  3. Connect the negative lead of the voltmeter to the negative terminal on the car battery.