2000 window motor plug shows power and ground and motor goes both ways with power probe . only goes down when assembled
The most likely cause is the motor cannot handle the load required to raise the window back up, going down is easy, up is another story.
new motor . power probe will raise it
change out the harness that has the open circuit..it has flexed it's last time now~
Yeah that is what I was going to suggest, an amperage test on the harness from switch to motor and then a test of the switch's ability to switch polarity and handle the amperage.
Looking for a Used Lumina in your area?
CarGurus has 242 nationwide Lumina listings and the tools to find you a great deal.
Search Chevrolet Lumina Questions
Chevrolet Lumina Experts