When I did a repair on a 90s Ford Escort, the window stopped working because of corrosion on the switch. Removing the switch from the door and cleaning the contacts got it to work. And when the switch broke again, some alligator clips on extra wire I had laying around worked to get the window up permanently until a new switch was ordered. I don’t exactly remember what I did, but it was pretty straightforward (pin from window switch connector --> alligator clip --> wire touching electric motor to go up/down.

Another time, I needed to grease the track the window slides along because it was getting slow/stuck. Think I used the generic tub of marine grease. Worked like a charm.

Haven’t dealt with an actual dead motor yet