1.CHECK GROUND CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect power window main switch connector.
3. Check continuity between power window main switch harness connector and ground.

   Power window main switch | Ground | Continuity
   Connector | Terminal
   D8 | 8 | Existed

Is the inspection result normal?
YES>>Replace power window main switch. Refer to Removal and Installation.
NO>>Repair or replace harness.