I have 2009 RAV4 and it seems the Wipers are not functioning. When I turned it on from lowest to highest including switching the mist/int etc, the wipers were not moving or wiping? I have checked the fuse and all okay. I have retightened also the bolts. I can hear the motors are on. Rear wiper was okay. What seems to be a problem? Your assistance is greatly appreciated as winters and raining are approaching. Thank you so much!!