Go to
Harbor Freight and get a set of pry tools. They look like curved screwdrivers a little. Carefully take off the door panel. You wuill have to take off some screws for the arm rest. From here you need to look up some more on here ,or U Tube. You are going to test the motor and see if it goes with a jumper. That's just a start to get you going. Its not hard, but you really need to take your time on trhe panel if you want to keep your door looking good.