Its the motor/wire mechanism that is worn likely.
that or its dislodged off its runners
Need to remove door card and have a good gander
(if you find lots of metal filings around the motor/mechanism, sure sign of failure!)
that or its dislodged off its runners
Need to remove door card and have a good gander

(if you find lots of metal filings around the motor/mechanism, sure sign of failure!)
Wishes for more power...