Red Light Blinking In A Car After Locking: Meaning And Causes Explained
Red Light Blinking In A Car After Locking: Meaning And Causes Explained. In this video I will talk about red light blinking in a car after locking.
A red blinking light after locking your car means the security system is active. When this light is on, any attempts to break into the car trigger an alarm and other anti-theft measures. The blinking disappears when you unlock the car.
Here are some causes of the red blinking light after locking your car:
The anti-theft system is active
As mentioned, your locked car flashes a red light because the security system is active. Your vehicle’s anti-theft system has the following components:
Sensors
Locking your door activates the door and window sensors in your car. Tampering with these components triggers the sensors, which, in turn, trigger an alarm.
Keyfob
The keyfob activates and deactivates the anti-theft system. The “Lock” button engages the anti-theft system, resulting in the blinking red light. On the other hand, the “Unlock” button disengages the system, shutting off the red light.
Immobilizer
The immobilizer prevents a thief from starting your car without the correct key, adding an extra layer of security. This system varies among models.
A possible malfunction
Another reason for the red blinking light is a malfunction in the anti-theft system. To diagnose this, observe the blinking patterns. Changes to these blinking patterns could indicate various issues, including improper locking, a malfunction in the anti-theft system, or a depleted battery. It’s worth noting, however, that some vehicles have specific blinking codes representing different problems. Therefore, when you spot these unusual patterns, consult your owner’s manual or seek professional help to interpret the issue accurately based on manufacturer-specific diagnostics.
With that said, here’s how to fix the possible malfunctions:
Check the doors and trunk
Strange blinking patterns could indicate that you didn't lock your doors or trunk. A quick fix for this is to ensure the doors and trunk are shut tightly, then lock your car.
If this doesn’t fix the issue,
Check your car battery
The car battery powers your vehicle’s electrical and security system. If it’s depleted, the anti-theft system may not work.
Here’s how to check the battery,
• Turn off the ignition and pop the hood.
• Remove the battery terminals.
• Attach the corresponding voltmeter leads to the battery terminals.
• Check the readings. A healthy battery should be between 12.6 and 12.7 Volts. Charge the battery if it’s below 12.4 Volts.
• Once done, check if the red light resumes a regular blinking pattern.
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