How do you test the master window switch on the 95 sc 400? The passenger window and its side work but not from driver side. The driver side neither work. I saw a thread speaking of cracked wires in the door harness. If so how do you get to troubleshoot and remove repair or replace.

 

Pop out the back of the unit that holds the switches from the back with a flat screwdriver and then slide it backwards toward the back of the car being careful not to break any of the plastic clips. The harneses are in there. Test the wires with a multimeter. Im not sure of the exact wires to check. See if you can find a wiring diagram on here...do a search. There may be someone that has done this before that can tell you right off the top.

If you need to replace the switch assembly itself contact algia......there is a classified that he listed parting out about 10 cars. He is bound to have one cheap.