When Your Turn Signal Indicator Blinks Rapidly, Change Your Bulb


You typically can’t see your turn signal lights when you’re inside your car. However, most vehicles have a subtle way of letting you know when one of your blinkers burns out: the indicator in your dashboard will blink faster than normal.

Picture: Wikimedia Commons

As automotive site 2CarPros explains, the indicator inside your car is designed to operate under a specific electrical resistance. When the bulb burns out, the resistance changes, which causes the turn indicator in your dashboard to blink faster. This is a quick way to know whether your light needs to be changed without getting out of your car.

Turn Signals Blink Rapidly [2CarPros via Reddit]


  • People seriously don’t know this? This can also happen if you install LED globes which have a much lower resistance.

    • It is surprising that some people even barely realise they have indicators on their car.
      Also, what is with the amount of drivers start merging lanes and THEN indicate halfway through?

    • Yeah my first reaction to the headline is “no shit”. But I see so many fast flashing indicators that clearly a lot of people don’t know this.

  • Do people actually not check their lights every so often?

    Actually, ignore that, judging by the number of cars I see around with some/all lights not functioning I already know the answer.

  • I was under the impression nobody used their indicator these days? What is it good for anyway?

  • Bollocks, my blinker is malfunctioning now and it’s not the bulb (or globe). Swatmajor1 offers good advice. But in addition, by using a nail file to clean the contacts the problem can also be solved. So theres at least 3 things to check, bulb, fuse and contact between the connector and the bulb.

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