Hi Nor Nazia,

the most common reason that a signal blinks faster is caused by a bad bulb. If there is a lack of voltage in the car, the signal is likely to blink fast as well.

Here are some suggestions to resolve the issue:

1. Check all wiring for damages

2. Clean turn signal components and surrounding areas

3. Change fuses

4. Test or replace the vehicle’s battery

5. Replace bulbs

You can find out more here:

https://www.sunautoservice.com/flickering-car-lights/#:~:text=Why%20Does%20My%20Turn%20Signal,indicates%20a%20bulb%20is%20out.&text=If%20my%20turn%20signal%20flashes,problem%20with%20the%20ground%20connection