I've tested everthing i can think of to test. Wires comming out of the switch light up the tester when acording buttons are pushed. When i go down to the motor itself and poke the white wire into the motor it lights the tester when the roll up button is pushed but not the roll down button. When i poke the yellow wire into the motor it lights up the tester when the roll up button is pushed but not the roll down button. Am i missing something here?? Cant seem to track down a diagram anywhere. Any help?? I dont know exactly how a power window system is supposed to work.