Reconnect the 6P connector to the power window motor.
Check for voltage between the terminals.
There should be battery voltage between the No. 1 [No. 6] (+) and No. 2 [No. 5] (−) terminals when the ignition switch is ON (II).
Connect an analog voltmeter between the No. 4 [No. 3] (+) and No. 2 [No. 5] (−) terminals, and run the window motor down or up. The voltmeter needle should move back and forth alternately (a digital voltmeter should show the average voltage between 0−5 V).
Connect an analog voltmeter between the No. 5 [No. 2] (+) and No. 2 [No. 5] (−) terminals, and run the window motor at down or up. The voltmeter needle should move back and forth alternately (a digital voltmeter should show the average voltage between 0−5 V).