2001 chevrolet venture turning signals blinking fast both sides

the problem is that both sides blink fast the left one used to blink normally sometimes and fast again all the lightbulbs work and are not led i found the problem on the right side : in the front the side light blinks but the drl doesnt blink with it now both sides blink fast can anybody please tell me what my problems might be what part of the car i should check ?

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Fast blinker rate is to tell you that you have a bulb out. Test your turn signals with an assistant…you most likely will find one or more burnt out bulbs…