97 honda civic ex inconsistent turn signal
Check the connections of the bulb sockets and the contacts on the bulbs themselves. Sometimes a small amount of corrosion or oxidation can increase the resistance in the circuit enough to cause the flasher to cycle erratically. When the fast flashing occurs, check both your front and rear bulbs. Is one dimmer than the other? If so, start by checking that one first.
While unlikely...does your Honda have any sort of towing capability? If so, corrosion or a short in your trailer light connection can also wreak havoc on a flasher. If your car has a tow hitch, you may want to remove the trailer wiring adapter from the car's factory wiring and see if the problem disappears. If so, either remove or replace the defective controller.
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