Q: Headlights and dash lights flicker

asked by on

Hi. When I turn the car on, there is flickering of headlights and lights on the dashboard. I had the alternator replaced when I went to a shop to check the electrical system. The issue still persists inspite of this. What should I do? Thanks.

It is possible that your voltage regulator is going bad. Normally, this is integrated into the alternator but some vehicles have it separate. If the voltage regulator has failed, the amount of power that all your vehicles accessories will receive will be inconsistent. I would recommend having your voltage regulator located and tested for proper function. Since this is related to the electrical system of the vehicle, ensure this service gets performed by a qualified professional, such as one from YourMechanic. They will be able to inspect your electrical system and replace your voltage regulator if necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Headlights and dash lights flicker

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: Headlight delay

You should be able to go into your LCD display and got to headlight delay settings and set to the amount of time to have the headlights stay on after leaving the car at night.

Q: Hi Ben. I'm having my upstream oxygen sensors replaced. Is the price quoted for both upstream oxygen sensors? Thanks, Jose

Hi there. I have forwarded your question to our sales and service department so they can accurately tell you about the price estimate for replacing oxygen sensors. They will contact you via email once they can provide you a clear...

Q: Ventilation system seems to have some issues

Hello. It sounds like you have two separate issues going on here. The vent issue comes from the lack of engine vacuum making it to the interior control system. Most of the time this is as simple as finding 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 are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...