Skip the auto shop - Our mechanics make house calls

Q: Why does my interior lights flash on and off sometimes when I flip my dimmer switch?

asked by on

Why does my dome light flash on and off sometimes when I flip my dimmer switch? And my dash lights stay dim some times?

My car has 135000 miles.
My car has an automatic transmission.

A: Hello and thank you for contacting Your Mec...

Hello and thank you for contacting Your Mechanic.
The dimmer switch has a connection for the dome light and controls the dash lights with using resistance. The problem is the dimmer switch contacts have corrosion inside them and have created a cross path of current to the dome light. I recommend replacing the dimmer switch. If you need assistance in removing and replacing the dimmer switch, seek out a professional, preferably a Your Mechanic professional to help you with your dimmer switch.

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

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!

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: My car's battery light is on and it started to act funny while driving, what do you think is wrong?

These are all signs of a failing battery. You will need to have the battery tested. When the battery fails, the vehicle will attempt to run off of the alternator, which can cause it to stress and fail as well....

Q: Heater not working properly

Common causes of no or inadequate cabin heat include malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve, a plugged heater core, stuck open engine cooling thermostat, collapsed hoses, and low coolant level....

Q: After fuel pump replacment, car uses more gasoline

There is always a chance of something going wrong with a repair, but let's not start there. There may be a new concern, such as a vacuum leak or a sensor causing false readings. Since there was a recent repair,...

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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.