That's the one you use the most for yourself clean the connector and make sure it fits tight if it still doesn't work the contacts inside are fouled for that window you'll see right away that they are black from use use alcohol and a rag a very lite swipe with a nail board that the girls use will get it off but clean it again to get any grit out each windows contacts are bent copper/brass arms that pivot with with the button push and must both make contact at the same time to complete the circuit so you get this right 1 arm will go foward and 1 arm Will go backwards depending on up/down position you'll see what I mean when it's open in front of you do not put grease on the contacts it will short out the switch from melting and running to parts of the switch that it shouldn't be ok and thanks for the helpful rating That's the one you use the most for yourself clean the connector and make sure it fits tight if it still doesn't work the contacts inside are fouled for that window you'll see right away that they are black from use use alcohol and a rag a very lite swipe with a nail board that the girls use will get it off but clean it again to get any grit out each windows contacts are bent copper/brass arms that pivot with with the button push and must both make contact at the same time to complete the circuit so you get this right 1 arm will go foward and 1 arm Will go backwards depending on up/down position you'll see what I mean when it's open in front of you do not put grease on the contacts it will short out the switch from melting and running to parts of the switch that it shouldn't be ok and thanks for the helpful rating