I have never known an electric motor that got weak with age.......they have always seemed to either work,....or not work..........or............they work until they dont.
The right front power window on my 2002 disco II has been messed with by the previous owner or a hack shop. The motor wasn't working when I bought it,...I took it apart,...and cleaned it,...and now it worked. I was a hero. put it back in the door and it went up and down like a charm........but when I attached the window to it......it moved a couple of inches and quit...then wouldnt go in either direction.
The only way I can get it to work again when it does this is to take the motor apart again.....it then will do exactly the same thing.........works perfectly until I attach the window to the regulator......then it will move a couple of inches then quit.....requiring another complete dissasembly.
I'm thinking that the motor might be binding internally somehow........
Any thoughts or suggestions??
I will be ordering a replacement used window motor from car cannibal tomorrow unless someone on this list convinces me that my motor can be salvaged somehow.
Any ideas??
Brian in Austin

 

Nope, no idea's, just a new motor.

 

What spike said!