What can cause all my lights to blink (blink fast) when I use my turn signals.?


If I turn my left turn signal on, all 4 turn signals come on and blink fast. If u turn my right turn signal on, it does the same thing. What could be the cause of this.?

 

Have you looked outside the car for which lights are actually working? Maybe it means theyre all out? Never heard of that. Maybe multifunction went bad.

 

That is usually the indicator that one or more of the bulbs are out. Check that first, Should also be a flasher device someplace which could be bad. If that fails to resolve the issue it can be the wiring, also the signal switch that is in the steering column.