I was having a problem with my SR not closing all the way. The rear passenger side was staying below the roof line (Driver side was fine). I thought it was out of alignment but now the motor seems to be losing it's strength. The SR slows down big time just before it moves all the way foward and actually doesn't go as far as it did. Is it possible the problem is my motor starting to fail. Right now the SR slides forward and stops just before it gets all the way forward..(no clicking from the motor). I can press the switch down and have it slide back but when it goes forward it really slows down before the end. How can I test the motor to see if that's bad before I invest in a new one??

Thanks
Tom