Driver side window falls down doesnt work.

This site sell parts and give you step by step instructions along with tools needed for window regulator replacement. Took me 2 hrs last weekend. copy link below it will take your to part needed.

http://cpwstore.carpartswholesale.com/catalog/?N=0&sv=0&VN=4294967189+4294966242+4294965810+4294966811+4294967010&Ntt=Replacement+Window+Regulator&Nr=AND%28universal:0%29&ref=partfinder

it sounds like the window motor regulator has broken if the window is falling down.