So I know the window motors are not great to begin with on these cars but here's my issue. 86GT. My son and I just recently replaced the dew wipes on the car. The passenger side window gets progressively slower when putting them up. To the point now that he will not roll it down anymore for fear that they will not go completely back up. No AC, so this is problematic. I'm assuming the motor is about to crap out, but is there anything else that may cause this? Is the dew wipe pressing too hard on the window? Could the window be off track from installing the dew wipes? I have cleaned out the window switches when we first got the car, so I tend to think that is not the issue. Anything else I could be missing?
How was the window before the dew wipe replacement? I would suggest you loosen the top felt guides and see if the window goes up easier. If that is the case, they may be too tight. I had that issue when converting a manual window to power.
When I purchased my car the passenger side would not go up on its own. I pulled up with my right hand, and pushed the up button with the other. It move up with very little assistance.
My window switches were the problem. There is a how to clean and re-lube thread here on PFF somewhere. Easy to do. I would do this before I did anything else first.
Slow, but no issue getting all the way to the top.
Jim
Is this with the car running or just on battery power? I would check the felt guides, just to be sure they are not too tight (the outside half can scratch the window over time if they are too tight).
If you find you do have a weak motor, I suggest a replacement from O'Reilys. Ive used them in a few cars and found them reliable. Advance and Autozone ones are crap. Last I got for the Astro were I think about $50 or $60. (prob same ones knowing GM)
Is this with the car running or just on battery power? I would check the felt guides, just to be sure they are not too tight (the outside half can scratch the window over time if they are too tight).
With car running. I am about to head out and start taking things apart now.
I would check the felt guides, just to be sure they are not too tight (the outside half can scratch the window over time if they are too tight).
This was the problem. I bent back the guide a little, and the window operates as normal now. That's the good news. Bad news is, I discovered antifreeze on the passenger side floor mat which means a bad heater core. I am off to do research on how to fix that. Ahh the life of owning a 25+ year old car.
This was the problem. I bent back the guide a little, and the window operates as normal now. That's the good news. Bad news is, I discovered antifreeze on the passenger side floor mat which means a bad heater core. I am off to do research on how to fix that. Ahh the life of owning a 25+ year old car.
Jim
Good to hear. There is a 10mm bolt that moves this guide.
That's the good news. Bad news is, I discovered antifreeze on the passenger side floor mat which means a bad heater core. I am off to do research on how to fix that. Ahh the life of owning a 25+ year old car. 
