Why Is My Amp Not Getting Power?

Music is an indispensable component in many ways and enjoying car music through an amplifier has been very popular therefore it will be very annoying and annoying if there are times when this system has problems. Can’t turn it on.

Knowing the causes and how to fix basic car amplifier errors quickly will make things easier for owners.

Why The Car Amp Is Not Getting Power – Some most likely reason

The car audio system has a lot of details and complicated operation, so it is easy to understand if there is a problem that does not turn on and in these cases, we should really determine the cause and fix it properly to avoid it. unwarranted errors.

In case your amp still has power and it shows a warning light, check the color of the light to know:

  • If it’s red, your amp has overheated, the line isn’t coming, or some other electrical problem.
  • If yellow, your amp has a low resistance problem. Refer to this article to fix the above problem.

If it has no power at all, it may have some problems like these:

Loose Cable Connections

Before you start testing, make sure you’ve plugged it in securely and that there aren’t any loose connections.

Additionally, a stable 12V power supply to connect both the remote from your stereo and also the power cord from the power wire is required when you use this system.

Done with this step, and if the amp still doesn’t work, we will really move on to other technical tests.

Read more: Bad Ground On Car Amplifier (5 Causes)

Loose cable connections is one of common reasons why is my amp not getting power

Blown Fuse

Fuse fires are the leading cause of your amp’s power failure.

To see if the fuse is really blown, you should follow these instructions:

  • Take the fuse out of its place. You will probably need a wrench or screwdriver to do this.
  • Observe the fuse wire. If there are visible gaps or dark areas, it is burnt.

Shorted or Disconnected Wire

Another obvious error comes from the power connection types not working properly such as missing or disconnected wires. Take a close look at the three main zones: Turn-on Wire, Power Wire, or Ground Wire.

Remote Turn-on Wire

If everything is connected but your amp is still not working, chances are that your remote turn-on button has a problem not receiving power. This part acts like a switch, when its transmission mechanism is damaged, electricity will not be able to flow. At this point you should replace a new fuse with similar parameters.

The same thing happens when any switch in the house fails. You can turn on the switch, but the electric light will not light up.

Power Wire

Power Wire is something you should check next after you find no problem with Remote Wire.

This is a thicker wire than the remote and it usually has a battery voltage. You should first check to see if any inline fuses are occurring. If so, replace the cord. If not, check to see if the Power Wire is loose, corroded or shorted anywhere. Here are 3 problems that can happen with the connection wires when the system is not working.

Ground Wire

If Remote and Power wire both work OK. The next thing you should check is the continuation of Ground Wire. If the ground connection is not secure enough as corroded or disconnected from its intended ground source, your amp won’t work as well.

To fix it, try to fasten the ground wire to the car chassis, not to any painted background, so that the ground is not the ground. You strip away half of the insulating plastic for easy cleaning and mounting to the bar car chassis platforms.

Faulty Alternator

If your car amplifier has no power, this could be caused by the alternator. While the battery makes your car start, Alternator is responsible for keeping your car running while the engine is running and is also responsible for charging your battery while the car is running. So if the alternator is damaged, the amplifier will not receive power.

What’s more, this makes other components of the vehicle inoperable, such as the lights or the air conditioning system.

At this time, you should replace the alternator for the vehicle.

Amplifier In Protection Mode

Sometimes your car amplifier does not multiply because there is some fault in the product.

Protection mode is designed to temporarily shut down operation to help amplifiers avoid further damage.

You should check the following components such as cables, subwoofer or speaker to see where the malfunction is. Try checking the protection signal status when you unplug each connection type.

In addition, you should check for excessive heat because this is also the cause of putting your amp into protection mode and not receiving power. When you encounter this, you must fix it immediately because otherwise, your device will be at risk of exploding.

Amplifier might be in protection mode


If you have checked and do not see any errors like the above, most likely the problem is in your amplifier itself, perhaps it’s broken. You should bring it to a service center to check and make the most correct conclusions.

Regardless of the problem, when you can’t listen to music or because of a problem with the sound system, you should still have a thorough check with your car to not only make sure the amp is working but also ensure the electrical system. in the car is safe.


Why is my amp getting hot and shutting down?

There are four main reasons why this happens: speaker unit is blown or grounded, poor power, poor power/ the device isn’t getting the power it needs, low impedance load on device or inappropriate gain adjustment setting (too high or too low). Know the exact cause and fix it right away to keep your amp always in good condition.

How to test amplifier output with a multimeter?

The simplest way to test an amplifier output with a multimeter is to locate the power fuse, set your multimeter to resistance, and place your probe wires on both ends of the fuse. If the amp indicates a negative reading, the fuse is in bad condition and needs to be replaced.

What wiring do I need to install a car amplifier?

The kinds of wiring you must consider for amplifier installations are: the amp’s power wire and ground wiring, an inline fuse, a remote turn-on wire, RCA cables, speaker wires.