Left turn light blinking frequency problem

You have a light bulb out, or a bad connection to the bulb. Your owner's manual will explain that the rapid blinking is a warning to you that a bulb needs replacement.

--scott

Thank you very much. That sounds like an easy fix.

Rapid blinking indicates that one or more signal bulbs is burned out. Check 'em. The front and/or rear signal lamps may have multiple bulbs- ANY one bulb burned out will trigger fast-blink to let you know a bulb's gone.

Author wrote: (1994 Corolla DX 168k Miles)

I notice that the left turn light blinks much faster than before. It goes on and off for about 4 times a second. Normally it should only blink about twice a second, right? The right turn light is normal. What might be wrong? ____________________________________________

Two times per second is about right.

The blinker switch pulses slower when less current passes through it as a result of a thinned bulb filament or a corroded bulb socket, or a poor ground.

The switch pulses faster when too much current passes through it due to a short circuit, sometimes inside a bulb between brake light and parking light filaments.

Another cause of rapid pulsing is installing the wrong bulb. A high-intensity brake bulb will draw higher current that the stock bulb, resulting in faster blinking.

Good luck.

Rodan.

If your car has the typical thermal breaker turn sig unit, then a short will heat the bimetallic strip faster and you will see faster switching. A blown bulb will make the turn sig unit work slower. Look for a short in the bulb, the bulb socket, the turn sig switch in the column, or in the wiring.