Hi, I just bought a 1992 lexus sc 400 a week ago, the lady told me the driver window rolls up and down sometimes, after I bought the car, both windows didn't work, but today to my surprise the driver window rolled up and I could roll the passenger window down up no probelm, it also rolls smooth, I checked all fuses and they all work, Does anyone know what the probelm is, I was about to buy new window motors too but now I know they work, What could the probelm be?any help would be appreciated, thank you.

 

get a new switch

 

Thanks for responding O.L.T, do you mean the button switches you hold down to roll the windows up and down or is there another kind of switch? sorry, im a little car illiterate, thanks.

 

i had that happen once before, only lasted for a few hrs then the worked again. I notice when they don't work, there is no power to the switch (no lights), of course. This is the second time it happaned and has lasted for a few days... I need to fix this! any insight anyone?

 

This happened to me awhile ago...the techs here at Lexus ran a series of tests(Including switching out master switches with another SC) and found that the wires that run through the doors near the door hinge was pinching up somewhere. The light on the master switch would come on after so many times opening and closing the doors. We manually fed power to the motor and the regulators and both sides worked...
So I got tired of it and bought me a set of used door wire harnesses...hopefully this will solve the problem...

 

yeah, no lights for the window either, the mirror works fine though, just the windows dont work.

 

It's either the master switch or the wire harness to the switch.

 

Just bought a new swtich, its not the swtich, it must be the wires then? thank you.

 

Also, where can I go to get new wires?

 

Just wanted everyone to know my windows statred working yesterday perfectly since I bought a new swtich, its wierd though that it didn't first work when I first installed it, and only worked the next day, anyone know why? thanks.

 

I think anytime you replace an old switch you are doing yourself a favor. that one day it rains the window will get stuck down If any further problems come along have the wiring inspected. Wiring problems are rare. Generally always blame the switch first.

 

thanks for your help O.L.T. see ya around the forums, thanks.

 

ok well I have the same problem except on my sc300 my master switch has never worked for the windows...the passenger switch works just fine and on the master the mirrors, everything but the 2 windows work...I bought a new master switch and it still doest work!! so I lost 100 for nuthin is this a definite wiring problem??