Why do my Turn Signals Blink Fast With LED Lights

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To get turn signals (indicators) to flash, there needs to be something in the electrical circuit that automatically switches the turn signal lights on and off when power is applied.

Unfortunately with turn signals (indicators), you cannot directly replace a filament light bulb with an LED replacement, without modifications.

An LED light bulb places a different (smaller) load on the electrical circuit. Your turn signals will therefore flash faster with an LED light bulb fitted.

There are ways around this, but it involves fitting additional components. Unless you specifically want LED turn signals, it’s easier to replace the light bulbs with what was originally fitted to the vehicle.

To fit LED light bulbs, you can:

- Fit an LED compatible turn signal relay.
- Increase the load on the electrical circuit by fitting load resistors.

For more information, see:

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Hey! I have GMC Terrain 2020 SLE i changed from stock to LED signal light so the hazardous works fine but when i turn left or right it always blinks fast like wtf is happening.
What should i do? Buy and replace resistors? I still don’t understand

ohno
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Do you know where they sell LED turn signal relays?

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