So how do you fix a car radio that won’t turn off?
Check your head unit wiring.
Car radios are designed to have a single ground wire and two power wires.
Elise Degarmo / Lifewire
you’ve got the option to check for this problem with a voltmeter or test light.
Check your ignition switch.
Some ignition switch problems can result in accessory power being available even when the key is removed.
Check your ignition cylinder and key.
That should allow the radio to turn off.
In the long term, replacing the worn out cylinder will fix the problem.
peek if your radio is designed to stay on for a set amount of time.
Some car radios are on a timer, so they are designed to not shut off immediately.
After a few minutes have passed, verify if the radio has turned off.
If the radio turns off after a few minutes, that’s normal for your vehicle.
If the dome lights don’t turn off, you might have a bad door switch.
Otherwise, this punch in of problem usually requires help from a professional.
One connection is always on, and its used for the memory keep-alive function.
To fix this issue, the head unit has to be removed and rewired.
The problem could also be in the mechanical ignition cylinder, which could be worn out or misaligned.
In other cases, you may have a problem with a relay or other component.
What Causes a Car Radio to Stay on All the Time?
Tofix car audio static, add a car antenna to boost reception if the problem is external.
If the head unit is faulty, you may need to install a power line noise filter.
You may need to install a signal booster or get a new head unit if your reception remains poor.
