Turn Signal V70 Wagon 2001 4WD, 60,000 miles

On right turn only blinker will go at a faster than normal rate, and will receive message of bad bulb. I have replaced all bulbs and problems still occurs. This is an intermit problem.

I have checked bulbs, and also checked the grounding to each socket.

When the four way flasher is used all works ok. Could this be a flasher problem and if so where would the flasher be loacted?