Skip the auto shop - Our mechanics make house calls

Q: When I open my doors the interior lights don't come on.

asked by on

When i open my doors the lights do not come on, but do come on when i manually turn my dimmer switch and press the map lights. I have checked fuses and no luck, I have read about a CTM could that be my issue or could it be that the switches in the door frames are bad

Hello. Without knowing the make and model of your vehicle, it hard to definitively give insight on the exact component that has failed.

In general, when the door is opened, the switch turns on the interior lights. If the lights are not coming on, then its possible the switch has failed. It also possible there is a short between the fuse and the door switch.

Does your vehicle have a door ajar warning light, and if so does it turn on when you open the door? The door switch in question would be responsible for this warning as well, and if its not working this would indicate that the switch has gone bad or is not receiving power. The switch is used and impacted often enough that it is more likely to fail than any other component in the circuit.

You will need to test the available voltage at the door switch, and what the voltage is after the door switch is supposed to turn on. If there is available voltage before the switch, and no voltage after, you will need to replace the door switch as necessary.

If you’re unable to fix the issue, have a certified technician, like one from YourMechanic, come to your location and diagnose the electrical issue and firsthand.

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

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: Had to manually unlock car & key stuck in ignition

A few different things can cause the vehicle to respond this way. The reason why the key is stuck in the ignition is probably due to the steering wheel being locked. When the steering wheel is locked it does not...

Q: First, the fuse 19 keeps blowing. When I hit the brake pedal my dash lights up. The third brake light acts like a running light.

Hi there. Check the wiring on the vehicle to the tail and brake lights. There is a cross short that is causing the lights to blow the fuses and make the tail lights brighter than normal. If you need further...

Q: Interior lights

Hello. Pulling the fuse will cause all of the interior lights to stop working and will affect some of the other electrical systems also. If you are not getting the vehicle fixed any time soon then the only way to...

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...
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...
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...