What Causes the Turn Signal Frequency to Increase?

1 Answers
DeNathan
07/30/25 3:29am
An increased turn signal frequency may be caused by poor bulb contact, a broken bulb filament, mismatched bulb specifications, or a faulty bulb control relay. Below is a detailed analysis: Poor Bulb Contact: You can first inspect the bulb to check for poor contact. If there is poor contact, it may cause the signal to flash too quickly. In this case, the bulb needs to be resecured. Broken Bulb Filament: It could also be due to a broken filament. Prolonged use can lead to aging, which may prevent the turn signal from functioning properly and require timely replacement. Mismatched Bulb Specifications: If the left turn signal bulb has a different power rating or model, it can cause the frequency to increase. In severe cases, it may even lead to a bulb circuit break. Faulty Bulb Control Relay: You can use a multimeter to test the output line of the circuit to see if it is functioning normally. If there is no output or the output remains at 12V, the relay should be replaced with a new one.
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