vegas_sc4

iTrader: (1)

Ok so I have a 94 sc300 and my passenger window doesn't work. When I put power to the motor it works but niether switch will work. The switch only works to make it go up but not down. Could the motor be bad or a wiring problem somewhere?

good2go

iTrader: (6)

It could be either the wiring OR the master switch. The ground path for the passenger window operation is routed through the master (driver side) switch. In my case, I had a passenger window that would only go down, but not up on either switch. After verifying the motor functioned fine, I was thinking it was the wiring in the door jambs. I traced all that out and found it was still good. Then I followed the circuit path back to the master switch and found it to be bad. Swapped it out and it's been fine since. The FSM has a good troubleshooting section on the window operation.

vegas_sc4

iTrader: (1)

Ok cool thanks I'm gona source another switch and see if that fixes it.

bangdangvn

I'd check the wires in the door jamb prior to buying a switch. Mine was snapped in half.

good2go

iTrader: (6)

+1 that's probably more common than a bad switch

vegas_sc4

iTrader: (1)

Would that matter if the switch only works one way?

good2go

iTrader: (6)

^^ It's been a while since I worked on mine, but if my memory serves me correctly, the answer is YES, a broken wire could cause a 'one-way' only fault too.

vegas_sc4

iTrader: (1)

Great sucsess. It works now. The red with blue stripe wire was broke in half. Thx guys