What are the red lights that flash after locking the car?

2 Answers
OAlex
07/23/25 8:17pm
What are the red lights that flash after locking the car? These are the car anti-theft lights (anti-theft lights are not only red). If the car engine anti-theft light flashes at a frequency of once every 1 to 2 seconds, it is normal. This indicates that the car's engine has entered the anti-theft state, and the engine anti-theft system is activated. More details are as follows: 1. Some car owners report that the anti-theft light keeps flashing after locking the car and they want to turn it off. Generally, after the car owner presses the lock button on the smart key, the car's anti-theft system is activated, and the anti-theft light will flash. Some car owners worry about power consumption, but the power consumption of the anti-theft light is negligible for the car battery. 2. Some car owners may find it annoying, so they can go to a repair shop to disconnect the wiring harness of the car's anti-theft light. However, this undoubtedly increases the risk to the car. 3. If the anti-theft light does not light up, that is when you should really worry, as it is a clear symptom of a fault, usually caused by a malfunction in the car's anti-theft system or the anti-theft light.
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MarcusRose
08/10/25 6:18pm
I just researched this a few days ago. The flashing red light after locking the car is the vehicle's anti-theft warning light. It's usually located near the dashboard or center console, glowing red or orange-red, blinking to indicate the anti-theft system is activated. This device is connected to the car body sensors, and it will trigger an alarm immediately upon detecting vibrations or unauthorized door openings. I tested it myself the day after I bought my car - if you try to force open the door with a mechanical key, the car will immediately flash lights wildly and sound the horn. But be careful, if this light stays constantly lit without blinking in older cars, it might indicate a problem with the anti-theft module. When washing my car, I avoid the circuitry in this area to prevent water damage or short circuits that could affect normal functionality. Nowadays, many new cars even come with connected anti-theft systems where you can check the vehicle status directly from your phone.
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