Even though both of your headlight bulbs have been exposed to the exact same conditions, they usually won’t fail at exactly the same time. So it’s actually pretty common to have one bulb burn out before the other.
What would cause both headlights to burn out at the same time?
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. Consult your owner’s manual to locate the main fuse for the headlight circuit and replace that fuse with one having the same amp rating.
What can cause your headlights to not work?
4 Reasons Your Headlights May Not Be Working
- Burned-Out Bulbs.
- Damaged Relay. …
- Wiring Problem. …
- 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.
What are the symptoms of a bad headlight relay?
Headlights Don’t Turn On
The most common sign of a bad headlight relay is headlights that don’t work. A headlight relay will typically fail in the open position, preventing voltage from reaching the headlights. If the low beam relay fails, the low beams won’t work.
What to do if one of your headlights is out?
- First, try your dimmer switch. Often that will turn them back on again.
- Try the headlight switch a few times. If that does not work, use your parking lights, hazard lights, or turn signals.
- Pull off the road as soon as you can and leave your hazard lights on so that other cars can see you.
Can I drive with one headlight?
Driving with one headlight would be possible, but it is still illegal since the driver may get into a car accident which may also cause a serious collision, affecting other drivers and people. So, as per the consensus and rule of the states, driving with only one working headlight is prohibited.
Can you drive with one headlight 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 long should headlights last?
A standard headlight normally lasts five years or so, but that’s not the case with some replacement bulbs. Most cars have had at least one headlight replacement during their lifetime, especially considering that the average age of cars on the road is about 12 years.
Does each headlight have a fuse?
Like all electrical systems, the headlights in your vehicle have a fuse in the circuit to prevent too much electricity from reaching the bulb. There will also be a headlight relay that switches power from the low beams to the high beams. If the fuse goes bad, you likely won’t have any headlights at all.
How do you diagnose headlight problems?
Diagnosing the issue is a straightforward process.
- Turn on your headlights. Replace whichever headlight bulbs do not turn on. …
- Open the engine compartment fuse box. Pull the fuse that operates on the non-functioning headlight circuit. …
- Connect the negative lead of the voltmeter to the negative terminal on the car battery.
Are high beams and headlights the same bulb?
Generally, you’ll have a standard halogen bulb for low beams, and then an HID bulb for your high beams. These are not interchangeable. … If you only have two headlight elements (one per side), then your vehicle uses a dual filament bulb to operate both the high and low beams.
How much does it cost to fix a wiring problem in a headlight?
The wiring may be damaged over a period of time. It can cost you $100 per hour. The reason behind the problem may be a faulty headlight switch. Often times, if the headlight works only on high beam or low beam, the dimmer switch may have broken.
How do you check a headlight relay?
Find the headlight relay closure:
Usually, it is under the hood of the car. The point where your fuse panel is most likely located. On the other hand, it may also be located inside the cab of the car, this would be the case if your car comes with an interior fuse box.
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.