Skip the auto shop - Our mechanics make house calls

Q: The electronics in the car flicker after I've been driving for a while.

asked by on

The headlights, speedometer backlights, radio and a few other things will flicker when I come to a stop. After I start going again it continues until I really step on the gas. I believe it is the alternator because the one in the truck is factory and the truck has 140,000 miles on it. A few times when I've been stopped at a red light, the truck will even turn off.

My car has 141000 miles.
My car has an automatic transmission.

Hi there.

There is a loose wire or ground in your vehicle causing the lights to flicker when driving. Look for any wiring that is loose and tighten it up. Also check the battery cables and make sure that they are tight and clean.

A loose battery cable will cause the lights to flicker when the vehicle is driving in motion and bouncing on bumps in the roads.

If you need further assistance with your lights flickering, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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
  • Home
  • Questions
  • The electronics in the car flicker after I've been driving for a while.

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: Tire Pressure Light coming on

The Tire Pressure Light comes on when the air in the tire is low. If you have tested the tire pressure and it is normal, but the Tire Pressure Light remains on, you need to have the TPMS system checked...

Q: Truck acting like it's not getting gas. 1987 Chevrolet Blazer

You should have the idle air control valve and throttle body cleaned out if it is gummed up or has an excess buildup of carbon. If cleaning it does not help, then you may have a bad idle valve and...

Q: We have charged both batteries 100%, replaced the voltage regulator and altenator, but when we use the lights the battery drains

Hi, thanks for writing in. It sounds like the wire from the batteries to the alternator could be faulty. If this wire is not performing as it should the voltage from the alternator will never reach the batteries to charge...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.