Skip the auto shop - Our mechanics make house calls

Q: The dome and the rear brake lights are not working.

asked by on

The rear braking lights are not working, Also the interior courtesy light is not working. I checked all the fuses and they are all good. I think it has to be something that provides power to both units. Please help

My car has 134000 miles.
My car has an automatic transmission.

Hi there. It is very rare that these two circuits affect each other. It can be a failure in the SAM module if both of these problems started at the same time, but most of the time they are separate. Typically the interior lights stop working because they are bypassed or because there is a module issue.

I always check the dimmer first to make sure that the lights were not turned off. As for the rear brake lights, this is usually caused by a bad brake switch. This is a common failure on this vehicle. In some cases the SAM module will need to be tested to find further issues. If you need to have this looked at, consider YourMechanic, as a certified technician can come to your home or office to diagnose the brake light issue and follow through with repairs.

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: Car is jerking forward when car is stopped with brake applied.

What you are describing is a real safety concern. You should have your Mustang's brakes checked out right away before you drive it anymore. It sounds like there may also be an idle control issue that is causing RPM's to...

Q: Temperature gauge rises when stopped

It sounds like there may be a problem with your cooling fan, particularly the fan clutch. The fan clutch has a mechanism, that based on the temperature of the engine, will either let the fan spin faster or slower. When...

Q: Battery drained, solenoid doesn't engage - 2008 Mercedes-Benz B200

Hello. The battery is located under the front passenger seat. The seat lifts up and pulls forward to allow access to the battery. However, if your battery is 8 years old, it would be best to replace the battery with...

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...
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...