just roll the window all the way up. remove key. install key and turn on. roll window down all the way. once it's all the way down hold the switch in the down position. count to 10 then let go of switch. roll window all the way up. once it's up hold switch in up position and count to 10. let go of switch. turn off key and remove. now the express up and down should be programed. you don't HAVE to do all of the above steps on every window reprogram. you can just roll window up, roll down window hold switch. then do same on up. this works 90% of the time.