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Why my car radio is not working?

YuanYuan Liu |

Why my car radio is not working

 There are a few different reasons for a car radio stopped working after the battery died. It is possible that your headlights are not turned off and the car battery is dead. Or because it is just too old and the temperature is too low, the battery is dead. After all, nothing can be used all the time. Anyway, if the battery is dead, then you can solve this problem by: battery charger or replace with a new battery. Anyway, if the battery is dead, then you can solve this problem by: battery charger or replace with a new battery. After the problem is solved, you can start again. Everything’s fine, right? Except your car radio stopped working. It will be a lot more complicated.


Cracking the Code of the Dead Battery and Dead Car Radio

The first, and most common, is the anti-theft "function" of the car radio. It will work as long as the battery is dead. When this happens and car radio stopped working, all you have to do is to enter the correct car radio code, and then the head unit will be restarted working.

In some rare cases, you may be facing a damaged radio, or damage to other electronic systems other than your radio. For example, if your radio is turned on due to an incorrect operation, the radio and other sophisticated electronic equipment may have been burned out.

If you are lucky, it may just be a fuse problem. Just replace it with a new fuse. If you are not lucky, you can only take it as a lesson. It is very important to connect the jumper cable and the battery charger.



Some Common Causes of This Type of Problem

  1. Security Reasons
  • If the radio keeps flashing "codes", then this is the problem you have to deal with.
  • The code may be in your user manual, or you can contact your dealer for inquiries.
  • Car stereo with code function requires you to enter a pre-set code when the battery is exhausted or disconnected.
  1. Damage was done when a jump start
  • If precautions are not taken, the electrical system components may be damaged during the jump start process.
  • Before using the radio, please check the relevant fuses and fusible wires.
  • If the radio is both energized and grounded, then it may have an internal fault.
  1. Pure coincidence
  • It may also be a strange coincidence that a dead battery or a start suddenly will cause the car radio stopped working.
  • If your radio does not have a security code and all fusible connections and fuses have been checked, you will have to do more diagnostic work to figure out what happened.


The Curious Case of the Car Radio Code

When the power of the radio is cut off, the anti-theft feature will be activated. When the power is restored, the unit will basically be locked until you enter a specific code. 

Most OEM head units have this function, and the thief mainly targets aftermarket head units. This means that car radio code has almost completely become a headache for legal owners of car radios, not thieves, who intended to cause them inconvenience.


When Fuses and Fusible Links Save the Day

If your head unit fails due to a poor start or charging, and you are lucky, then you may find that your car radio fuse is blown. In some cases, it may be a fuse located inside the radio, and in other cases, it may be a fuse in the car's fuse box.

In other cases, you may find that a fusible connection is broken, or a wire has melted. In other more serious cases, you may find that other electronic components, including your extremely expensive electronic control unit, may also be damaged.

This is why it is so important to know how to connect jumper cables. Never connect them wrong or let anyone connect them wrong.