The earliest purely mechanical manual:
Advantages: reliable, easy to clip not hurt,
Cons: time consuming
PWE
1. shaking windows basic components:
If it involves the most simple electric window:
It requires: 1), position information 2), the motor 3), determines the stall
2. Motor Control
3. If the window regulator only know after the stall stopped, it is still dangerous, because the whole system down the long run, will inevitably go wrong.