Q: My headlights flicker when I drive.

asked by on

My headlights seem to flicker when driving. They get brighter or dimmer without me changing anything. What's going on?

There are several factors that can cause headlights to flicker while driving. The more common problems could be related to the headlight bulbs themselves, a weak battery, or even the alternator starting to fail.

If those items are fine, however, then I would have to dig a little deeper and inspect the wiring, relays, switches, and the light sockets. Loose connections, worn-out switches, or burnt relays and sockets can all cause intermittent breaks in power.

Have your lights checked out by a certified mechanic sooner rather than later to keep you from getting stuck driving in the dark without headlights, and to prevent unnecessary damage to your electrical system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My headlights flicker when I drive.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How Long Should Headlight Fuses Last?

All fuses in your vehicle are technically designed under normal conditions to last the life of the vehicle. A fuses primary job is to open up if the current flowing through the circuit it is protecting exceeds its rated capacity....

Q: Radio light goes out with the light switch turned on.

Hello and thank you for contacting YourMechanic. If the radio is a stock radio and not an aftermarket radio, then the lights should be tied into the dimmer switch. Turn the dimmer switch to adjust the lights and see if...

Q: Do I have to reset any settings after changing battery and does the hose on the side of factory battery need to be re connected.v

Yes. You will need to reset your settings. Usually the dealer can do it free of charge but no promises. If you take a battery off and put a new one on, if there was anything hooked up the the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...