Electric window goes down but not up and battery light illuminated

[306rhys]

Is there a way to check if the alternator is loose from the chaging system other than inspecting wiring? Also I did attach 12v to the motor, it did work but didn't wind the window all the way up, only went about 3/5 of the way up still leaving a little gap. Needed to get to work and it was pissing it down outside so had to tape a bag on the window for the time being, then when I got back from work I've noticed that because I taped bag to the window the pressure of the air (had to drive down the A1 for about 40 mins) has now make the window loose from the frame. Will get some pictures and upload them in the morning.
Thanks