A5: Check Power Supply To Power Window Main Switch

Disconnect power window main switch. Turn ignition switch to ON. Measure voltage on Black/Red wire at power window main switch connector. See WIRING DIAGRAMS  . See WIRING DIAGRAMS  . Is the voltage 10 volts or greater? If yes, then go to A6: Check Power Window Main Switch Ground  . If not, then repair Black/Red wire between power window main switch and interior fuse panel.