Driver's Power Window Motor Circuit Breaker Test: Prius

Slightly lower driver's window. Disconnect harness connector from driver side window motor. Using an ammeter, connect battery positive lead to terminal No. 1 at connector (harness side). Connect negative lead of ammeter to negative terminal of battery.
Connect positive lead of ammeter from battery positive terminal to terminal No. 2 of wire connector (harness side). Window should raise to fully closed position. If window operates correctly, go to next step. If window does not operate correctly, go to POWER WINDOW MOTOR TEST . Continue to apply voltage. Check for current change from 14 amps to less than 1 amp within 4-90 seconds.
Disconnect leads from terminals. Wait 90 seconds, then connect positive lead of ammeter from positive terminal of battery to terminal No. 1 at master switch connector (harness side), and negative lead of ammeter from negative terminal of battery to terminal No. 2 at master switch harness connector. Ensure window begins to descend. If operation is not as specified, replace power window motor. See POWER WINDOW MOTOR under REMOVAL & INSTALLATION. If operation is as specified, power window motor circuit breaker is okay.