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: Electrical problems with my lights.

Hi there. The console lights and the tail lights are on the same circuit for your vehicle. Check the fuse box for a blown fuse. If there is no blown fuses, then check the wiring in the cab and see...

Q: How do I program and reset Remote Start?

Remote start is a helpful feature. Remote Start allows you to start your vehicle before you get into it and keeps it running for a certain amount of time. This is particularly helping in hot or cold weather conditions because...

Q: Charging 14 volts and drops to 11 volts then back and forth

This is most likely caused by a poor connection to the voltage regulator or the alternator. Try to lightly wiggle the alternator wires all the way from the battery to the alternator and regulator connections to see if you can...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...