hello, i was searching up ways to diagnose the problem for my ls400's window switch.
all but the driver side window switch does not work.
so i took it apart and when i looked at the driver side window switch, it looked burnt out.
so i cleaned it and i pieced it all back together and connected it and now none of my window switches work.
not even my sunroof and auto tilt steering wheel.
i checked and tested all my fuses under the hood and by the kick panel. all good.
battery is in good condition.
anyone have any answers or problems, let me know, please
thank you.

 

This may sound dumb of me to ask, but first and foremost, did you make sure your window lock switch is off?

Also, does anything on that master switch panel work? For instance, does the door lock switch still work? Does the window lock switch work? - To test the lock switch, depress the button and try the other window switches on the other doors. The switches should not work when the lock switch is depressed, and should work when the lock switch is off.

Also, check out this thread. Other owners have had the same problem in the past.