About a month ago, my wipers began running off the edge of the drivers side windshield then slam into the base. I was told by a mechanic this was due to a bad motor. Car is 2005 Honda Accord with 170K and had original wiper motor. So I replaced the motor but generally have the same issue, plus the wipers wont come to a rest at the bottom of the windshield. They come back up about 6 inches every time, even when I turn them off. I'm not sure what to do to correct. Any help or suggestions would be greatly appreciated.