Electrical Issues

Hey Mike, I don't think the regulator is bad or it would be binding all the time. I think it's probably the carbon brushes in the motor not making good contact all the time with the motors armature. It could also be a bad wire/elec connection between the switch & the motor. Both of these are usually caused by the dirty environment inside the door. There is a lot of moisture & dust inside there. One thing you can try is when you run the window down, don't run it all the way down, try parking it an inch from the bottom. This will park the motor brushes in a different place where maybe they will make better contact. Also the brushes can make bad contact from lack of use in the winter when you don't open the windows much, & I've seen them cured just by running them up & down 10-15 times when they are working. This cleans the carbon dust/crud off the brush contact area. A good way to check for the stuck motor brushes, is to smack the bottom of the door while holding down the switch. This rattles the motor & gets it moving again.