Make sure ALL of the bulbs are working. If one or more bulb has failed, the flashers stop so that you'll be forced to check them out. If it's not a bulb, it could be the turn signal switch.
If you're sure the fuse is okay, the next thing to check is the bulbs. If the bulbs are okay, the problem could be the turn signal relay, also called the flasher relay.
could be a bad ground
try to determine if it blows when you signal left or right. Once you find out which side the problem is on, there is either an exposed wire shorting out or there is corrosion at the turn signal harness for that particular side, front or rear.
One of the bulbs is burnt out.
You may have a "ground loop" problem on the left turn signal. Check the ground wire at the front and rear signal bulbs.
Bulbs blown?
def check bulbs first. check all of the bulbs. Could also be the turn signal switch inside the steerring colum
Could be the bulbs or the fuses or the flashers or the signal switch assembly
Front signal bulbs on a RSX are changed from the engine bay. Find the lightbulbs for the signal bulbs located towards the bumper of the vehicle. Pull them out and replace them.
Turn signal bulbs and hazard bulbs are the same bulb. When the turn signal is turned on, the indicator light on the dash flashes in tune with the turn signal. When the hazard lights are turned on, an extra fuse which is live, powers the hazard flashers, even if the car is turned off.
TO fix a broken Astro turn signal, check the flasher first. Then check the sockets and bulbs to find the problem.
Faulty Turn Signal flasher Faulty Turn Signal Switch