Car Radio Won’t Turn Off

You wouldn’t think that the radio not turning off would be a problem but there are cases where the radio stays on when the car is off. Now that’s a problem and here’s all you need to know to solve it.

When Should the Car Radio Turn Off?

There are a few different ways in which this works. It depends on the make and model of your car and the way your stereo is set up and wired. But there are a few standard moves that will switch the car radio off. You need to know what they are to understand what the problem is when your radio won’t turn off. Let’s go over them.

When You Turn It Off

This one is fairly obvious. Your car radio should turn off when you switch it off manually. This means you press the button or switch it off using a remote if your radio came with one.

When Your Car Is Turned Off

Your car radio is also supposed to turn off when you take the keys off from the ignition. This happens because at this time, the electronics circuit of your car closes and all the electronic items in the car like your fans, wiper and radio shut off.

But there might be a slight variation in this depending on the make and model of your car. Some of the newer automobiles have a different circuit system. So, your head unit might continue to play music for about 10 minutes after you switch off the car. They often turn off when you open a door after switching the car’s engine off.

When Ignition Is in the Start Position

Another time when your radio is supposed to shut off is when you place your ignition in the start position. This is when you start your car but the keys are only in the first position. It shuts off your car radio if there is no other way to bypass the electronic circuit of the car.

Now, some of the older models do not have as much power as the latest automobiles. This means the batteries are used to deal with problems that were related to their ability to handle the load when the motor is being started.

So, manufacturers designed the circuits in a way that made sure that there was minimal load on the battery when the car is still in the ignition cycle.

So, when you turn the car key, the circuit gets closed and the car gets powered without dealing with any of the electronics in the vehicle. That’s why the fans, wiper and radio get switched off when you are still in the ignition cycle.

So, when you are still in the start stage, the radio does not get any power even though it can be played when the ignition is in the “On” phase.

Causes of a Car Radio Not Shutting Off

Now you know when a radio won’t turn off in the car. You might have noticed that it is fairly easy to detect when there is a problem. Here are a few things to check when you encounter one of these situations. The solution is specific to the scenario at hand so be sure to thoroughly examine the stereo so that you don’t mishandle the situation.

1.     Delayed Turn Off Feature

As mentioned earlier, a lot of newer cars have a feature that keeps the radio on for a little while after the ignition has been turned off. In case your car falls in this category, you should check the head unit or contact the manufacturer to make sure that it is not a problem.

And if you want to just test it, all you need to do is switch off the ignition and leave the car. Lock it behind you and see if all the electronics, including the radio, have turned off behind you.

That’s because this is supposed to cut off all the power to the electronics in the car so that the battery does not get drained. It is particularly applicable to newer cars.

You can figure out the definition of “newer cars” by checking the headlights. If your car makes a beep sound when you leave the car but forget to switch off the lights, it can be described as an older car model. In the newer cars, they will be powered off automatically.

If your car has a built-in timer for the radio, it will not get switched on right away even after the key has been removed. But now you know how to test it to make sure it is not a problem and just a delay.

You can double-check by testing the headlights. If they don’t switch off even after you switch off the vehicle and exit it, you might be dealing with a problem.

2.   Incorrect or Faulty Wiring

The second reason why your radio might not switch off when it should is if there is a wiring problem. This is a common problem which means despite the trouble, you can find a solution rather easily.

One of the reasons your head unit does not turn off when it should is the wiring. It could also be a problem with the ignition switch which means it is a mechanical problem.

In this scenario, you must look into the ignition cylinder and not the key. It means you must check to see if the ignition cylinder or key is worn out. If yes, that means the switch is not moving to the switched-off position even though you have removed the car key. You might have to replace the cylinder to solve the problem.

Step-by-Step: Fix an Always-on Car Radio

One of the most common reasons for a car radio refusing to turn off is bad wiring. That is, of course, after you have ruled out the time delay feature’s functioning. When you are dealing with bad wiring, here’s what you do.

First, you need to know that your car’s head unit usually has a ground wire and a couple of power wires. One of the power wires is always hot while the other wire is hot only when your car engine is up and running. So, if your radio never turns off, it could be because the main power wire is connected to the wire that is perpetually hot. If you want to fix this problem, here’s what you do.

Step 1: The head unit must get its power from the wire which is hot only when the engine is on. That’s how you need to connect the wires.

Step 2: This kind of wiring fixes must be done by following the instruction manual. It is a problem in the head unit and must be fixed so that the radio switches off.

Step 3: If you can’t seem to get everything up and running, it is possible that the fault lies with the head unit. You might have to replace it especially if it is an old unit.

Step 4: For this, you must take it to the nearest auto garage and get a professional to take a look.

But before that, you can try and fix a head unit on your own by following these steps. You must turn the stereo settings to off in alignment with your ignition. You can do this by going to Settings > Factory Settings > Engineering debugging > Direct Shutdown

This will make sure that the head unit turns on and off through the ignition switch. And your problem is solved.

FAQs

Q: Can a Car Radio Drain Your Battery?

A: In theory, yes. But it is not very likely for some of the newer models. But if you are trying to switch your car on after enjoying the radio for a while, it might be because the radio drained your car battery. You will need to jump it to get it back on track.

Q: What Are the Signs of a Bad Ignition Switch?

A: Your first clue is that the car will not switch on when you try to do so. It means the ignition switch might be broken. Other signs are that there will be no noise when you try to turn on the car, the key itself might not turn and the lights in your dashboard might flicker uncharacteristically.

Q: Do I Need to Disconnect Battery to Change Stereo?

A:  Yes and you need to start with the ground wire of your battery. You should do this before you remove the existing stereo from its place. The ground wire is usually black in color and is connected to the car battery from under the car’s hood. This is a delicate job and might be best left to the professionals.

Wrapping Up

The scenarios where the car radio wont turn off are finite and quite easily detected. It is not a big problem except the constant blaring of music till you figure out what is causing the problem.

You can reduce the volume while you are troubleshooting but you can never switch it off during the process because you need to know if your solutions are working.

It is also a smart move to switch on the radio and switch it off again to see if your solution actually worked or are likely to repeat itself when you are back in the car the next time.

Last Updated on December 5, 2021 by Danny Reid