The lock light came on after about one minute.
I started a new spin cycle. The pulley turned back and forth several times, stopped agitating, then it sounded like it was trying to pump water (no excess water was in the washer since I had not set it where it would fill).
After a couple of minutes, it turned a couple of rotations counter-clockwise as viewed from the back, stopped, then started to "spin" clockwise slowly for multiple rotations, appeared to try to speed up, almost imperceptably, then stopped. The pump continued to try to run for a couple of more minutes, then stopped. After about a minute, the pulley went CCW again a couple of rotations, stopped, then once again went CW for multiple rotations, it definitely appeared to try to spin but was certainly not fast enough to extract water from clothes, then it stopped spinning and the pump came on again.
After a minute or so the washer started agitating back and forth about two spins in each direction, several times, it was still doing this when I came back to the computer.
Can I wait until the part arrives and I have repaired the washer to supply a rating for you? If this part fixes the washer, I will give an excellent rating.
Ok, that is fine, I will provide a rating now.
A follow up question. I cannot see the top middle switch from the open panel at the back of the washer. Do you have any tips on how to access this switch? Will I need to remove the dryer from the top of the stacked unit, or can the switch be accessed by removing the front control knob panel?