Q: The Radio stays on when the car is off

asked by on

Happened suddenly. The radio and cigarette lighter port stay live when the car is off. I removed the radio and tested the 12 v accessory line and found it putting out 12 volts even with the car off. Also the cigarette lighter which also should turn off stays live as well. The radio is aftermarket but that doesn't matter as i removed it and the wire stayed live. The only other item added was a remote start 2 - 3 years ago.

Thanks

My car has 127000 miles.
My car has an automatic transmission.

Hi there:

Accessories are powered by the battery until the vehicle is started, when the alternator takes over. If the radio is staying on after removing the key, it’s receiving a constant supply of battery power due to a faulty relay. You’ll have to purchase a service manual to trace which relay is faulty, or contact a professional mobile mechanic to complete an electrical problems inspection.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. The Radio stays on when the car is off

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: Rhythmic moaning noise that starts at ~30mph and grows in intensity as speed increases - what could it be?

Hey there. This is a common sign of failing wheel bearing(s). A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface of the rollers and...

Q: Stiff power steering

If your vehicle has hydraulic power steering, the level is probably low. If it is low, there may be a leak. If not, the pump may have failed. If your vehicle has electronic power steering, the fuse may be blown...

Q: What does the Intelligent Key™ battery discharge indicator mean?

Your Intelligent Key™ is a critical element to operating your car, but it does require a little bit of maintenance. The most important tip for owners is to make sure the battery is replaced. Without a good battery, they key...

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 Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...