I just changed the blades and then realized my wipers weren't working. I could hear the motor turning inside with a noise so I decided to change the motor. I tested the wipers without the arms to make sure they were in position. The linkage seemed to be working properly with the new motor. I put the old arms back on and they would get stuck halfway through the cycle. I decided to buy new arms. The same problem occurs. I cleaned the windshield to see if that was the problem. I almost seems like its not getting enough power, even with the new motor. Please help!