How to Fix a Car Subwoofer With No Sound

Are you having trouble getting your car subwoofer to work? Do you have no sound coming from it at all? If so, don’t worry; you’re not alone. We’ll show you how to fix a car subwoofer with no sound in this post. Whether your speaker is blown or just not getting power, we’ll help you get your system back up and running in no time.

How to Fix a Car Subwoofer With No Sound

So please pull up a seat, put on some tunes, and get started! We’ll cover the most common causes of this problem and provide some tips on troubleshooting and fixing it. So if your subwoofer is giving you fits, keep reading, and we’ll help get it back up and running in no time!


If your car subwoofer has no sound, there are some steps you can take to try and troubleshoot the problem. First, check all of the fuses, as well as any loose wires or interference.

Then check the antenna cable and change out the speakers and amplifier if needed. If wiring shorts are present, replace any faulty speaker wiring in the box. If these steps don’t work, you may need to replace the subwoofer itself and inspect for a faulty ground wire.

Seven Reasons That Causes Car Subwoofer to Produce No Sound

1. Voltage Fluctuations

The amplifier that drives the subwoofer might be set to a voltage level that is too low to push the speaker. If this is the case, the speakers should have an under-voltage indicator light. Also, check your manual for more information about what voltage you should be running through the speaker.

2. The Wiring Harness is Not Powered

If the wiring harness from the receiver or amplifier to the speaker is not receiving a signal, it will not produce any sound. So make sure that your receiver or amplifier has an option to send a signal to the speakers. If this does not turn them on, check along with the wiring harness for loose connections and make sure the connection from the receiver or amplifier to the harness is plugged in all ways.

3. Speaker Doesn’t Receive Any Signal

Check your manual for setting up a system to work with your speakers and make sure you are following all of the instructions correctly. If you do not have a manual, check along with the wiring from the receiver or amplifier to the speakers to find a connection that is not plugged into anything.

4. Speaker Short or Open

If you have determined that the speakers are being turned on, there might be a short in one of the speaker’s voices coils. This will cause an open circuit to appear and not allow any power to go through it. It will also drain your battery if this happens while you are driving. Instead, follow the wiring back to the voice coil and use a multimeter to check for continuity to check for a short or open.

5. Broken Speaker

If none of this works, you likely have a broken speaker. For a car subwoofer without sound, if it’s an electronic or variable-rate subwoofer shorted out because of something else in the system, we suggest purchasing a regular manual speaker and replacing the electronic version.

6. Power Problem

Check along with your speakers to ensure they get enough power to run properly. Blow fuses or breakers can prevent proper running of the speakers and not allow them to produce sound. If you have access, check along with the wiring from the battery to the speakers for a loose connection.

Check Along With Your Speakers

7. Speaker Wire is Loose

If all connections are secure and you still can not get sound from your speaker, ensure that the wire is not loose in the speaker or amp input. This will not allow power through to any part of your system and cause it not to work.

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10 Ways on How to Fix a Car Subwoofer With No Sound

1. Check the Fuses

Car audio systems are very sensitive to power surges, and you wouldn’t want your subwoofer to blow along with the fuse. Make sure there is no debris or corrosion in the fuse box. Clean it if necessary before attempting to solve this problem by replacing it with a new one specific for car audio systems.

2. Check for Loose Wires

The subwoofers in a car audio system are usually wired directly to the amplifier, and if a wire were to become loose, of course, there would be no sound coming from it. So check each connection between your amplifier and speakers/subwoofer carefully to make sure they were not accidentally loosened.

3. Check for Interference

Interference can come from a variety of sources. It may be coming from an electronic device in your car, the devices surrounding your car, or even signals being broadcasted by other appliances near you. Ensure all electronic devices are off before attempting to tinker with the wiring around them to find out which one is causing interference. If there are no electronic devices near you, try to listen closely for any sound coming from other appliances like power lines or microwaves.

4. Check the Antenna Cable

If there is no current running through your amplifier when your stereo system is on, then it could be because of a faulty antenna cable connection. The source signal may not be strong enough for the amplifier, so replace or repair your antenna cable to see if that solves your problem.

Check the Antenna Cable

5. Change the Speakers

If you’ve gone through all of these steps and still have no sound coming from your car subwoofer, it may be time to change them. It could have been that your speakers are blown, it could be that the wiring is faulty, or even that the previous owner damaged them somehow.

6. Change the Amplifier

If you’ve already tried changing your speakers and they still don’t work, something may have gone wrong with your amplifier. First, try testing it with a different pair of speakers to see if they are compatible. If not, then you may have to replace the amplifier.

7. Check for Wiring Shorts  

Short wiring can cause intense white noise or no sound from your subwoofers. First, check the wiring connections around the subwoofer for any signs of burning or melted insulation. If you find any, remove the subwoofer from its housing and check if the sound emanates from the sub itself instead of amplifying it.

8. Replace Faulty Speaker Wiring Inside the Box

If the noise is coming from the subwoofer itself, but there is no sound coming out of it, then a short in a wire running from the amplifier to the speaker could be causing this problem. If it turns out that this is what’s going on, you will have to remove and replace speaker wiring inside the box.

9. Replace the Subwoofer

If there is no noise coming from your subwoofer, then it’s most likely that the speaker inside it has been blown, and you will have to replace it with a new one. They may not always be easy to find, but they shouldn’t cost too much money.

Replace the Car Subwoofer

10. Check for Faulty Ground Wire

A short in-the-ground wire inside of your subwoofer can cause no sound or unbalanced audio to come from it. First, you will need to remove the casing on your subwoofer and check if the wires are firmly housed within their sockets. Try re-crimping them and replacing any previously damaged ones if they aren’t.

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Some Helpful Tips and Suggestions

Here we have given some tips on how to fix a car subwoofer with no sound.

  1. If the amp fuse is blown, check the fuses in both the driver’s side and passenger’s side door jambs.
  2. If the power wire is cut or has corrosion on it, replace it to eliminate any chance of a short circuit.
  3. Check the speaker wires to make sure they are hooked up securely at both ends and that there are no broken or bare spots in the insulation. If you find loose connections, clean them up with electrical tape and solder.
  4. Ensure all the speaker wire connections are secure and not corroded or dirty; clean them up with electrical tape or WD-40. If there is corrosion, use a wire brush to remove it.
  5. Check all the wiring in the trunk area where the amp is located to make sure they have not been cut. If they have, repair them using electrical tape or solder the wires back together.
  6. Make sure that the main power wire to the amp is intact and has not been cut. Use a voltmeter to check for continuity between the battery post (negative) and the main power wire (positive). Also, make sure all your speaker wires are hooked up to the amp’s speaker output terminals.
  7. Check that the remote wire is attached securely to the amp’s remote terminal, and make sure there is continuity between it and the ground (the metal part of your vehicle). If there is no continuity, you will need to check every connection in between with a multimeter or voltmeter.
Check Remote Wire

Frequently Asked Questions

Are Blown Subwoofers worth Anything?

It all depends on your personal preferences and budget. However, if you are looking for a way to add bass to your music and you have the money to spend, then a set of blown subs might be a good investment for you.

Why Did My Subs Stop Working?

One possibility is that the wires in the subs may have become loose. If this is the case, you may need to reattach the wires using a wire connector. Check for any obstructions in the area where the wires enter the subs and remove them if necessary. If the problem still persists, it might be necessary to replace the subs.

What Can I Do with a Blown Subwoofer?

If your subwoofer is blown, it means that the low-frequency driver (the part of the subwoofer that makes the bass) has failed. This can happen for a variety of reasons – humidity, dust, overloading, etc.

If your subwoofer is blown, there are a few things you can do to try and fix it. First, you may want to try and power it down and let it cool down. If that doesn’t work, you may need to replace the entire subwoofer.

Can You Fix a Blown Sub?

Yes, if the blown sub is not too badly damaged, you can usually fix it by replacing the torn speaker cone, soldering the wires back together, and re-attaching the grill.


It can be a major inconvenience when your car subwoofer isn’t working. Not only is the sound quality compromised, but you may also miss out on some of the power and bass that make driving an enjoyable experience. Although this guide is specific to fixing a car subwoofer with no sound, the same basic steps can be applied to other car audio components.

If you’re experiencing any issues with your car audio system, we suggest consulting your owner’s manual or contacting an experienced mechanic for help. We hope this blog post on how to fix a car subwoofer with no sound has been informative. If you still have any questions, then feel free to comment below!

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