1) Disconnect the harness connector of the power window main switch.
2) Check the continuity when the power window switch is operated to the LOCK direction.
Connector & terminal
(D102) No. 2 — (D102) No. 3:
Did the indicator change from “No continuity” (1 MΩ or more) to “Continuity exists” (less than 10 Ω)?
Replace the power window main switch.