check for a burnt out bulb and if all the bulbs light it's possible you need a new turn signal flasher.
Check for a burned out bulb or could be the turn signal flasher going bad
It has been my experience that a rapid turn signal indicates there is a burnt-out signal light bulb (either front or rear) on the side of the rapid blinking signal. If the right signal is blinking rapidly, the problem is in the signal lights for the right side (front or rear) of the vehicle. Turn the rapid signal on and step out of the vehicle to find which bulb is not lighting.
If it's blinking, it's a turn signal.
Defective turn signal switch.
Where is the turn signal flasher on a 2002 impala
it needs to be replaced
Defective flasher relay.
The turn signal on your 2002 Audi Quattro may start and stop due to a few common issues. One possibility is a faulty turn signal relay, which controls the blinking of the lights and may need replacement. Another reason could be a poor connection or a burned-out bulb, which can disrupt the signaling function. Additionally, the turn signal switch itself may be worn or malfunctioning, affecting its operation.
change the flasher to a slower blinking brand. They are cheap and you can try a few brands
One reason why the turn signal will not stop blinking is the clock spring. This is something that many people replace themselves. Another possible cause of this problem could be the switch needing to be replaced.
Turn signal lights that double as parking (marker lights) when not blinking.
where is turn signal flasher 2002 nissan frontier