Just got high mileage 93 LS400. Only driver windows works. Seller states they all quit at once. Sounds like bad master switch. I'm sure master window lock is off. Could it be master window switch? All door locks work.

 

check your fuses first and yes it could be your master switch. do the windows roll down using their individual switches?

 

Def sounds like the master switch. Can you roll the windows down at each door or not?

 

Just checked them all. Individual switches do nothing.